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_____ 1. The cell body of a neuron does all of the following except
- a. release neurotransmitter into the synaptic cleft
- b. produce synaptic vesicles containing neurotransmitter that are subsequently transported to the synaptic knob.
- c. conduct graded potentials to the initial segment
- d. receive graded potentials from dendrites.
Introduction:
Neuron is a basic functional unit of the nervous system and is the specialized cells of the nervous system that makes a complex network for the transmission of messages. A neuron is made up of a cell body, nerve fibers: dendrites and an axon in its structure.
Answer to Problem 1DYKB
Correct answer:
The cell body of the neuron does not involve the released neurotransmitter into the synaptic cleft. Therefore, option a is correct.
Explanation of Solution
Reasons for the correct statements:
Option a. is given as “release neurotransmitter into the synaptic cleft”. Cell body does not involve in the production of neurotransmitter. The axon part of the cell body receives the graded potential which causes fusion of synaptic vesicle to the vesicle to the plasma membrane of the synaptic knob. This fusion results in the release of neurotransmitter from the synaptic vesicle. Hence, cell body does not cause the release of neurotransmitter into the synaptic cleft.
Hence, option a is correct.
Reasons for the incorrect statements:
Option b. is given as “produce synaptic vesicles containing neurotransmitter that is subsequently transported to the synaptic knob”. The cell body is involved in the synthesis of synaptic vesicles which contain neurotransmitter and these synaptic vesicles are ultimately transported to the synaptic knob through axon. Hence, option b. is incorrect.
Option c. is given as “conduct graded potentials to the initial segment”. The cell body involves the conduction of graded potential. Hence, option c. is incorrect.
Option d. is given as “receive graded potentials from dendrites”. The cell body receives the chemical potential from the dendrites. Hence, option d. is incorrect.
Hence, options b., c., and d. are incorrect.
The release of neurotransmitter into the synaptic cleft is not the function of the cell body.
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Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College