Anatomy & Physiology: An Integrative Approach
Anatomy & Physiology: An Integrative Approach
2nd Edition
ISBN: 9780078024283
Author: Michael McKinley Dr., Valerie O'Loughlin, Theresa Bidle
Publisher: McGraw-Hill Education
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Chapter 12, Problem 1DYKB

_____ 1. The cell body of a neuron does all of the following except

  1. a. release neurotransmitter into the synaptic cleft
  2. b. produce synaptic vesicles containing neurotransmitter that are subsequently transported to the synaptic knob.
  3. c. conduct graded potentials to the initial segment
  4. d. receive graded potentials from dendrites.
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Summary Introduction

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.

Conclusion

The release of neurotransmitter into the synaptic cleft is not the function of the cell body.

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Chapter 12 Solutions

Anatomy & Physiology: An Integrative Approach

Ch. 12.4 - Prob. 11WDYLCh. 12.4 - Prob. 12WDYLCh. 12.4 - Prob. 13WDYLCh. 12.5 - Prob. 14WDYLCh. 12.5 - Prob. 15WDYLCh. 12.6 - Prob. 16WDYLCh. 12.6 - Prob. 17WDYLCh. 12.7 - Prob. 18WDYLCh. 12.7 - Prob. 19WDYLCh. 12.7 - Prob. 20WDYLCh. 12.8 - How are EPSP and IPSP graded potentials...Ch. 12.8 - Prob. 22WDYLCh. 12.8 - How does depolarization and repolarization occur...Ch. 12.8 - Prob. 24WDYLCh. 12.8 - Prob. 25WDYLCh. 12.9 - Prob. 26WDYLCh. 12.9 - Prob. 27WDYLCh. 12.9 - Prob. 28WDYLCh. 12.9 - Prob. 29WDYLCh. 12.10 - Prob. 30WDYLCh. 12.10 - Prob. 31WDYLCh. 12.11 - Prob. 32WDYLCh. 12.11 - Prob. 33WDYLCh. 12 - _____ 1. The cell body of a neuron does all of the...Ch. 12 - Prob. 2DYKBCh. 12 - Prob. 3DYKBCh. 12 - Prob. 4DYKBCh. 12 - Prob. 5DYKBCh. 12 - Prob. 6DYKBCh. 12 - _____ 7. An action potential is generated when...Ch. 12 - Prob. 8DYKBCh. 12 - Prob. 9DYKBCh. 12 - Prob. 10DYKBCh. 12 - What are the four structural types of neurons? How...Ch. 12 - Prob. 12DYKBCh. 12 - How does myelination differ between the CNS and...Ch. 12 - Describe the procedure by which a PNS axon may...Ch. 12 - Prob. 15DYKBCh. 12 - Prob. 16DYKBCh. 12 - Explain summation of EPSPs and IPSPs and the...Ch. 12 - Graph and explain the events associated with an...Ch. 12 - Prob. 19DYKBCh. 12 - Prob. 20DYKBCh. 12 - Prob. 1CALCh. 12 - Prob. 2CALCh. 12 - Prob. 3CALCh. 12 - Prob. 4CALCh. 12 - Sarah wants to call her new friend Julie and needs...Ch. 12 - Over a period of 6 to 9 months, Marianne began to...Ch. 12 - Prob. 2CSLCh. 12 - Prob. 3CSL
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