No, to become resistant to antibiotics, individual(s) in the population must randomly mutate and that mutation, if heritable, will cause the bacterial population resistant to antibiotics.
Antibiotics are drug treatments that combat infections resulting from bacteria in humans and animals by using both killing the microorganism and making it difficult for the bacteria to develop and multiply.
An antibiotic is a sort of antimicrobial substance lively towards microorganisms. It's miles the most important sort of antibacterial agent for fighting bacterial infections, and antibiotic medicinal drugs are widely used in the remedy and prevention of such infections.
Antibiotics are used to deal with or save you from some forms of bacterial contamination.
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The chrysanthemums shown in the photo produce their
blooms in the fall.
Which term best describes this kind of plant?
A. Nonflowering plant
B. Day-neutral plant
C. Long-day plant
D. Short-day plant
Answer:
Solution A. The phrase that best describes this kind of plant is non-flowering plants.
without flowers plants.
Mosses, liverworts, hornworts, lycophytes, and ferns are among the non-flowering plants that reproduce through spores. Conifers and gymnosperms are non-flowering plants that still set seed.
There are no grains, fruits, or flowers on non-flowering plants. Typically, spores are used to create them. They contain cryptogams and gymnosperms. However, a group of plants known as gymnosperms do produce seeds.
According to the options, the distinction between flowering and non-flowering plants is that the former "produce cones, while the latter do not. " ".
This is demonstrated by the fact that flowering plants produce seeds from their flowers, whereas non-flowering plants only produce cones.
Another difference between the two is that flowering plants use pollination while non-flowering plants use dispersal.
Option A) "Nonflowering plants" is the phrase that best describes this kind of plant. ".
true or false? when one first begins to exercise, one is working anaerobically because there is an insufficient amount of oxygenated blood at the site of the working muscles.
True. When someone first starts to do exercise, they are working anaerobically because there is an insufficient amount of oxygenated blood at the area/site of the muscles that are working.
The ACSM defines anaerobic exercise as intense physical activity that lasts for a relatively brief period of time, is powered by the energy stores present in the contracting muscles, and is not dependent on the inhalation of oxygen.
Deoxygenated blood from the upper body is transported to the heart by the superior vena cava, whereas deoxygenated blood from the lower body reaches the heart through the inferior vena cava. The right atrium receives blood from both the superior and inferior vena cava.
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cells synthesize a variety of complex molecules to include proteins, nucleic acids, lipids and carbohydrates. a large majority of the molecules that cells make are proteins. which three organelles are most involved in synthesizing proteins?
The nucleus is one of the organelles involved in protein synthesis Ribosomes, Endocytic reticulum in rough (RER).
What is required for the production of proteins?The presence of various necessary components, such as an abundance of the 20 amino acids that make up the majority of proteins, is necessary for protein synthesis to take place. A group of enzymes that will participate in the process are another crucial element. Both DNA and ribonucleic acid (RNA), another type of nucleic acid, are necessary for life.
What is the primary mechanism behind protein synthesis?ATP serves as the energy currency for all internal cellular operations, including protein synthesis. Cellular respiration generates ATP, which serves as cellular energy.
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ere is a hypothetical mrna sequence: 5' g a u g c g u a a a u a g 3' what is the amino acid sequence encoded by this mrna?
Most messenger RNA (mRNA) contains the instructions to synthesize the polypeptide chain (protein). The translation is the process through which mRNA is converted into protein.
The definition of the genetic code is the arrangement of nitrogenous bases in an RNA molecule that holds the instructions for constructing a protein molecule. The genetic codon's ability to specify a single amino acid by way of mRNA and a sequence of three nucleotides is one of its characteristics.
No delay occurs, and the genetic codon is read as commas. When a genetic codon is deleted, the entire sequence is altered. A codon is made up of a sequence of three nucleotides. The first codon in the above mRNA sequence, GAU, codes for aspartic acid (Asp), and the second codon, GCG, codes for alanine (ala). The third codon, however, is a stop codon (UAA), meaning it does not encode any amino acids. Chain termination will thereafter take place. Asp-Ala will therefore make up the brief amino acid sequence.
Hence, three nitrogenous bases code for one amino acid.
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what potential cellular processes could be eliminated if proteins carbs and lipids are eliminated from one's diet?
Carbohydrate, protein, and fat breakdown and synthesis are linked to glucose catabolism pathways, this potential cellular processes could be eliminated.
Why proteins carbs and lipids are are very important?They are necessary for the diet as supplies of essential fatty acids and fat-soluble vitamins, which tend to associate with fats. They also provide satiation, taste, and palatability to the diet.
If someone's don't receive enough fat in your diet, may have symptoms including dry rashes, hair loss, a weakened immune system, and vitamin shortages.
Serious protein deficit can result in edema, fatty liver, skin deterioration, increased infection severity, and stunted development in children. While real insufficiency is uncommon in affluent nations, inadequate consumption can lead to muscle atrophy and an increased risk of bone fractures.
Severe carbohydrate restrictions might lead the body to convert fat into ketones for energy. This is known as ketosis. Side effects of ketosis include poor breath, headaches, weariness, and weakness. It's unclear what type of long-term health consequences a low-carb diet may entail.
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In the fall, the leaves of some trees change color. This happens because chlorophyll breaks down and the accessory pigments become visible. What hormone is responsible for this?.
Answer:
its B
Explanation:
which statement is false? the shoot system of a plant consists of the stems, leaves, and adaptations for reproduction.
Plant root hairs help to absorb carbon dioxide from the soil.
Root hair cells
Plants absorb water from the soil by osmosis. They take up mineral ions by active transport against a concentration gradient. Root hair cells are well-suited for absorbing water and mineral ions because of their large surface area and high absorptive capacity.
It also contains many mitochondria, which release energy from glucose during respiration to provide the energy needed for active transport.
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in people sickle cell disease is expressed codominantly. when an individual is heterozygous they have both normal and sickled cells, but has only sickled cells when they have only recessive alleles. what is the phenotypic ratio of offspring with two heterozygous parents?
Because heterozygotes can arise through two distinct pathways (receiving one dominant and one recessive allele from each parent) and because heterozygotes and homozygous dominant individuals share the same phenotype, the law supports Mendel's observed 3:1 phenotypic ratio.
Sickle cell anemia causes the red blood cells to swell and become thin. If a person only possesses one copy of the sickle cell allele, then half of their red blood cells will be deformed. The allele is codominant in this fashion because it is possible to see both the healthy and sickled variants in the blood. A heterozygote exhibits codominant simultaneous and unblended expression. The example of codominance is the roan cow, which has both red and white hair. The two traits are combined in imperfect dominance in a heterozygote. The altered hemoglobin that causes sickle-cell anemia is inherited and is a codominant trait. Individuals who are heterozygous (Ss) in particular express both sickle and normal hemoglobin, resulting in a mixture of sickle and normal red blood cells.
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which drugs acts by blocking serotonin receptors in the gastrointestinal tract, vomiting center of the brain, and chemoreceptor trigger zone?
In the gastrointestinal system, ondansetron (Zofran), a medication, blocks serotonin receptors.
Does tea contain any drugs?Caffeine is a stimulant substance that some people perceive to be addictive and is present in some varieties of tea. Although it has been suggested that regular tea consumption may be associated with signs of dependency in certain individuals, experts disagree on whether or not tea addiction actually qualifies as an addiction.
What does nicotine do?The messages that are sent between the brain and body are sent more quickly thanks to the stimulant substance nicotine. Due to the fact that nicotine is the primary psychoactive component in tobacco products, the focus of this Drug Facts page will be on the consequences of nicotine use.
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what are the structures in the cerebrum that are elevated ridges, which increase surface area to increase the number of neurons in a specific area?
The purpose of the brain's gyri and sulci, or ridges and grooves, is to increase surface area.
What is the name for the raised ridges in the cerebrum?The shallow grooves on the cerebral cortex's surface are referred to as sulci, while the higher tissue ridges are called gyri.
Signals are transferred between nerve cells in different regions of the brain and body through white nerve fibres that are below the skin. The neocortex, a six-layered structure present in animals, has a wrinkled surface that enhances its surface area.
The cerebellum has an odd surface appearance that hides the fact that the cerebellar cortex, a layer of grey matter, makes up the majority of the structure. This layer's ridges are collectively referred to as folium.
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when a species population changes from exponential growth (j-shaped curve) to logistic growth (s-shaped curve) it usually does so where? when the population
A species population changes to exponential growth to logistic growth when it reaches carrying capacity.
The carrying capacity of an environment is the maximum number of individuals of a particular species that the environment can support indefinitely given available resources and habitats. Once the population of a species reaches the carrying capacity of its environment, it can no longer continue to grow exponentially, instead logistic growth occurs, slowing the growth rate and eventually reaching a stable equilibrium.
This transition from exponential to logistic growth is often represented on graphs as an S-shaped curve. The vertical axis represents population size and the horizontal axis represents time.
The curve starts steep, representing an initial rapid increase in population, and levels off as population reaches carrying capacity and growth slows.
Note that the carrying capacity of an environment can change over time due to many factors, including: Changes in resource availability, changes in the physical environment, or introduction or removal of other species.
When the population of some species changes from exponential growth (J-shaped curve) to logistic growth (S-shaped curve), it usually occurs when the population reaches carrying capacity.
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Are trying to create better batterie that can tore more energy o that electtric car can travel further on one charge
A new approach to improving battery charging capacity is to switch from graphite-based to silicon-based anodes. Silicon contains a higher energy density.
Using the same type of calculation, it shows that global reserves are enough to produce just under 2.5 billion batteries. The IEA's Net Zero Roadmap by 2050 says the world will need 2 billion battery electric, plug-in hybrid and fuel cell electric vehicles on the road. By reducing braking, sudden acceleration and driving at high speeds, it is possible to obtain a substantial increase in mileage. It is especially true in cold climates. Also, many modern vehicles now come with an "eco" drive mode. Electric vehicles of the future arriving after 2025 could switch to lithium sulfur or sodium ion battery cells that could be up to two-thirds cheaper than current lithium ion cells.
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If a cell is placed in a hypertonic solution, what will be the MOST LIKELY action that will result from the body attempting to maintain homeostasis? Select the two correct answers.
A
The cell will shrink as water moves between the environments to reach equilibrium.
B
Water will move by active transport out of the cell.
C
Salt will move by active transport out of the cell.
D
Salt will move by osmosis out of the cell.
E
Water will move by osmosis out of the cell.
The two actions that will most likely result from the cell attempting to maintain homeostasis are options B and C and can be seen below:
Salt will move by active transport out of the cellWater will move by active transport into the cell.What is Active transport?This is referred to as the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration against the concentration gradient.
It is used during the process of homeostasis which is the ability to maintain internal stability in an organism in response to the environmental changes and in a situation whereby the solution is hypertonic then salt will move out and water will enter the cell so as to maintain a balance thereby making it the correct choice.
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Changes in the genetic makeup of a population may result in a new ___ ; this is biological ___.
Changes in the genetic makeup of a population may result in a new species this is biological evolution
What is meant by biological evolution ?
[Biological evolution] is the alteration of a group of organisms' characteristics over a period of time; it includes everything from minute adjustments in the ratios of various gene forms in a population to the changes that resulted in the development of the earliest organism into dinosaurs, bees, oak trees, and humans.
Microevolution is the term for a small-scale change that occurs at the genetic level of a population. The belief that all life is interconnected and can be traced back to a single common ancestor is another aspect of biological evolution. We refer to this as macroevolution.
Changing populations and species of organisms are at the heart of biological evolution. Today, we are likely to associate the concept of evolution with a single person
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consider a field of insects all of which have essentially the same mass. if total mometum of the insects is zero what does this imply about their motion
There are two possibilities if the insects' combined momentum is zero. Either every bug is at rest, or an equal number of insects are moving in opposition to one another, canceling out the overall momentum.
What is momentum?Mass in motion is a definition of momentum. All things have mass, thus if something is moving, it must have momentum because its mass is in motion.
Momentum is a vector quantity with a direction and a magnitude that is described by the word. Newton-seconds are used to measure momentum. The relationship between mass, direction, and speed is referred to as momentum.
Momentum is a measure of how much an object is moving, whereas velocity is a measure of how fast an object is moving in a certain direction. Velocity is one of the components of momentum, which is defined as the item's mass multiplied by the speed of the object.
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in what way does the green alga ulva resemble land plants? it produces diploid gametes. it has a complex life cycle with diploid body cells and haploid gametes. it has a complex life cycle with alternation between multicellular diploid and haploid generations. it has a multicellular haploid stage that alternates with a unicellular diploid stage.
It has a complex life cycle with alternation between multicellular diploid and haploid. In this way the green alga ulva resemble land plants.
Ulva lactuca, often known as sea lettuce, is frequently used in salads as a marine vegetable. In addition, it is prepared and served with meats, fish, and soups. It is a typical human dietary source in China, Japan, Scandinavia, Scandinavian countries, Great Britain, and Ireland. America's U.S.
This is a little genus of green marine and brackish water algae. It is edible and frequently referred to as "sea lettuce." Formerly placed in the Enteromorpha order, species with hollow, single-layered thalli are now generally agreed to belong in Ulva.
Gametophytes are haploid multicellular plants (or algae) that use specialised cells to produce gametes, hence the name "gametophytes." The creature in this instance is already a haploid, hence meiosis is not directly engaged in the creation of the gametes. A diploid zygote is created through fertilisation of the haploid gametes.
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Ulva has a complex life cycle with alternation between multicellular diploid and haploid generations in this way it resembles land plants.
As a marine vegetable, ulva lactuca, also referred to as sea lettuce, is frequently used in salads. It is additionally made and served with soups, fish, and meats. In China, Japan, Scandinavia, the Scandinavian countries, Great Britain, and Ireland, it is a common source of human nutrition.
This small genus of green brackish and marine algae. It is sometimes referred to as "sea lett
uce" and is edible. It is now generally accepted that species with hollow, single-layered thalli belong in the Ulva order instead of the Enteromorpha order.
The term "gametophytes" refers to haploid multicellular plants (or algae) that require specialised cells to create gametes. Since the organism in question is already haploid, meiosis is not directly involved in the production of gametes. The haploid gametes are fertilised to produce a diploid zygote.
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Arrange the steps of the contraction cycle in the correct order from left to right. (Image of contraction cycle)
Calcium ions enter the overlap zones via excitation-contraction coupling to start the contraction cycle.
Explain about the Calcium ions?The physiology and biochemistry of cells in living things is influenced by calcium ions (Ca2+). They are crucial for the second messenger function in signal transduction pathways, neurotransmitter release from neurons, contraction of all muscle cell types, and fertilisation.
Nearly all bodily biological processes, including heart and muscle contractions, transmission of neuronal information, learning and memory, embryonic development, cell proliferation, and more, are regulated by calcium ions. Calcium ions are transported into the cytoplasm and organelles by calcium channels.
Since the calcium ion has two fewer electrons than protons and is not stable in nature, it is also referred to as Ca2+. It is a grey metal in its pure form.
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which pair of molecules are found in cytotoxic t lymphocyte (ctl) granules and are important for ctl killing of target cells?
Both perforin and granzymes are essential for the effective and efficient killing of cells. They are found in cytotoxic t lymphocyte granules.
The protein perforin, often referred to as cytoplasmic granule toxins, is a pore-forming agent. The cytotoxic granules of cytotoxic lymphocytes include a family of structurally similar serine proteases known as Granzyme (CLs). Target-cell apoptosis is collaboratively induced by perforin and granzyme. Target cells must be properly supplied by perforin in order for granzyme to cause apoptosis to occur.
Granzyme's likelihood of passive diffusion is further reduced by the fact that both perforin and granzyme attach to the target-cell surface as a single macromolecular complex linked with serglycin. Granzymes A and B's roles in triggering target-cell death have undergone significant in vitro research, and their molecular actions are more known than those of perforin.
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What are some of the key traits that make algae a desirable energy source? infer which trait(s) are related to photosynthesis.
By converting light energy to chemical energy through the process of photosynthesis, carbon dioxide and water are transformed into organic molecules.
Nearly all algae engage in the process, and in fact, much of what is currently known about photosynthesis was first uncovered through research on the green alga Chlorella.
Both light reactions and dark reactions are involved in photosynthesis (or Calvin cycle). The enzyme ribulose bisphosphate carboxylase binds carbon dioxide to ribulose bisphosphate, a 5-carbon sugar with two linked phosphate groups, during the dark processes. This is the first stage of a multi-step process that results in the production of sugars. The chemical energy required for the dark reactions is created during the light processes.
At the seedling and heading phases, five photosynthesis traits—chlorophyll content, net photosynthetic rate, intercellular CO2 concentration, transpiration rate, and stomatal conductance—were examined.
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The model shows a cell going through two cellular divisions.
What process is missing from the image that could further increase genetic variation within the four daughter cells?
A Independent assortment should occur for all chromosomes.
B Crossing over should occur between homologous chromosomes.
C DNA replication should occur for all chromosomes.
D Protein synthesis should occur between homologous chromosomes.
Crossing over should occur between homologous chromosomes is the process that is missing from the image.
What is cell division?
A parent cell divides into two daughter cells during the process of cell division. The preservation of the original cell's genome is the major goal of cell division. The chromosomes' genomic data must be duplicated before division can take place, and the duplicated genome must be evenly split among the progeny cells. The maintenance of genetic information consistency across generations involves a significant amount of cellular infrastructure.
Homologous chromosomes will align with one another and form tetrads during prophase I. DNA sequences between the homologous chromosomes may be exchanged during this lining up process. Crossing over is a type of genetic recombination that enables the genetic differentiation of the daughter cells of meiosis.
Only homologous chromosomes can cross over with one another. After meiosis I, cells become haploid and are unable to perform crossing over.
For the purpose of boosting genetic variety, crossing over takes place across homologous chromosomes. One chromosome's fragment gets swapped for another during crossing over. In the end, a hybrid chromosome with a distinctive genetic material pattern is produced. When neighboring gametes cross over, the resulting gametes are genetically capable of being distinct from one another. Cells can participate in evolution and the survival of the fittest since this promotes genetic variety.
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15. If your DNA sequence is 96 bases long. How long will the resulting amino acid sequence be?
If the DNA sequence is 96 bases long, the resulting amino acid sequence will be 32 amino acids long.
DNA is a long, double-stranded molecule that encodes the genetic instructions used in the development, functioning, and reproduction of all known living organisms. It is composed of four nucleotide bases: adenine (A), guanine (G), cytosine (C), and thymine (T), which are arranged in a specific sequence to form a code that carries genetic information.
The DNA sequence is read in groups of three nucleotides, called codons, which encode a specific amino acid or a stop signal for protein synthesis. Because there are four different nucleotides, each codon can be formed in 64 different ways, allowing for the encoding of 20 different amino acids and a stop signal.
If the DNA sequence is 96 bases long, it will be divided into 32 codons, each consisting of three nucleotides. These codons will encode the sequence of amino acids in the resulting protein. Therefore, the resulting amino acid sequence will be 32 amino acids long.
Overall, if the DNA sequence is 96 bases long, the resulting amino acid sequence will be 32 amino acids long.
which statement describes the role of specialized cells in an organism?
A. Specialized cells are short lived and used for initial growth
B. Specialized cells perform specific functions in tissues
C. Specialized cells active during periods of extreme stress
D. Specialized cells divide to form unspecialized cells
What is the difference between an inhibitory and an excitatory post synaptic potential?.
Answer:
An excitatory postsynaptic potential creates a local depolarization in the membrane of the postsynaptic neuron that brings it closer to threshold. An inhibitor postsynaptic potential does the opposite; it hyperpolarizes the membrane and brings it farther away from threshold.
Explanation:
When a portion of a population can no longer breed and produce fertile offspring with the rest of the population, then a ______ is present that prevents the two populations from sharing genes.
The sorting that occurs during blank______ separates homologues from each other.
The sorting which takes place during Meiosis I segregates homologues from each other.
Homologous pair of chromosomes or homologues are separated during Meiosis I. Meiosis I consists of a long prophase, which can be further split into five distinct phases, i.e. leptotene, zygotene, pachytene, diplotene as well as diakinesis. The bivalents get aligned on the equatorial plate during Metaphase I.
Anaphase I succeeds Metaphase I, during which homologous chromosomes progress toward opposite poles with both their chromatids. Each pole gets half the chromosome number of the parent cell. The nuclear membrane as well as the nucleolus reappear during Telophase I.
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Question 1 (1 point)
Which term describes a change in genotype that is caused when cells take up foreign genetic material?
a.transcription
b.homeostasis
c.DNA replication
d.transformation
Answer:
transcription
Explanation:
the following figure shows the general steps that occur when a researcher uses the crispr-cas9 system to modify a protein-encoding gene in a eukaryotic cell with the goal of modifying the protein product. drag the descriptions of the steps to their appropriate locations on the figure.
The CRISPR RNA molecule is also coupled to the Cas9 endonuclease, which splits the target sequence's DNA into its two strands.
What is eukaryotic cell?The cells of eukaryotes, which are living things, contain a nucleus and various membrane-bound organelles. Many other species of life, including all mammals, plants, fungi, protists, and the majority of algae, are eukaryotic organisms. Eukaryotes can be made up of one or more cells.
Eukaryotic cells typically contain other membrane-bound organelles in addition to the mitochondria and the Golgi apparatus. Chloroplasts are present in both plants and algae. In prokaryotic cells, rudimentary organelles might exist.
In eukaryotic chromosomes, histone protein clusters are tightly coiled around DNA. In comparison to prokaryotic cells, eukaryotic cells typically have a larger gene content. For instance, a human cell's DNA must be compressed because it contains roughly 2m, or 3 billion base pairs, in order to fit inside the nucleus.
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Which sentence best describes floods?
O A. Floods help drain moisture from dry land, making an ecosystem less stable.
OB. Floods can kill predator organisms and destroy old soil, making an ecosystem more stable.
C. Floods can kill organisms and remove soil, making an ecosystem less stable.
D. Floods always bring much-needed moisture to a region, making an ecosystem more stable.
The sentence that best describes floods is option (c)
Floods can kill organisms and remove soil, making an ecosystem less stable.
what is flood?A flood is when there is an excessive amount of water and it covers normally dry area. The word can also refer to the tide's inflow when used in the sense of "flowing water." Floods are a topic of research within the field of hydrology and are very concerning for civil engineering, agriculture, and public health.
causes of floodsome of the major causes of flood are
Heavy rainfall.Ocean waves coming on shore, such as a storm surge.Melting snow and ice, as well as ice jams.Dams or levees breaking.learn more about flood here
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Which rock is an example of an organic sedimentary rock?
A - iron ore
B - rock salt
C - limestone
D - sandstone
polysynaptic reflexes involve multiple synapses while monosynaptic reflexes only involve a single synapse. t or f
True, Polysynaptic reflexes involve multiple synapses while monosynaptic reflexes only involve a single synapse.
Monosynaptic reflexes include the biceps and triceps reflexes, and patellar stretch reflex . On the other hand, polysynaptic reflexes are mediated through at least two synapses and one interneuron.
Polysynaptic reflexes are kind of reflex that includes more than one synapse. They also involves one or more interneurons in the reflex arc. Therefore, the communication between afferent and efferent neurons is generally widely spaced. So, polysynaptic reflex contains interneuron between sensory neuron and motor neuron.
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