ANATOMY & PHYSIOLOGY LL W/CONNECT ACCESS
4th Edition
ISBN: 9781265521363
Author: McKinley
Publisher: MCG
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Chapter 12.2, Problem 5WDYL
Summary Introduction
To analyze:
The functions of these structures of neurons: dendrites, axons, synaptic vesicles, and neurofibrils.
Introduction:
The neurons or nerve cells are the basis of the nervous system. They constitute the nerves and are associated with the transmission of nerve impulses. The junctional region between two neurons is called the synapse.
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Which of the following is the role of axonal Calcium (Ca2+) channels in neuronal communication at the synapse?
a) they inhibit the action potential causing it to stop
b) Calcium channels have no role in this process
c) by allowing calcium to exit the cell, they promote the propagation of action potential across the synapse by creating depolarization
d) by blocking calcium entrance, they mediate the contraction of presynaptic axon to facilitate movement
e) when they open, calcium enters the presynaptic terminal, promoting fusion of neurotransmitter vesicles with presynaptic membrane, and release of neurotransmitters to the synaptic cleft
What are the basic components of the neuron?
Neurons, particularly those in the brain, receive multiple excitatory and inhibitory signals. What is the name of the extension of the neuron at which such signals are received? How does the neuron integrate these signals to determine whether or not to generate an action potential?
Chapter 12 Solutions
ANATOMY & PHYSIOLOGY LL W/CONNECT ACCESS
Ch. 12.1 - Prob. 1WDYLCh. 12.1 - Prob. 2WDYLCh. 12.1 - Prob. 3WDYLCh. 12.2 - Prob. 4WDYLCh. 12.2 - Prob. 5WDYLCh. 12.2 - Prob. 6WDYLCh. 12.2 - Prob. 7WDYLCh. 12.2 - Prob. 8WDYLCh. 12.3 - Prob. 9WDYLCh. 12.4 - If a person has a brain tumor, is it more likely...
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. 12.10 - Prob. 29WDYLCh. 12.10 - Prob. 30WDYLCh. 12.10 - Prob. 31WDYLCh. 12.11 - Prob. 32WDYLCh. 12.11 - Prob. 33WDYLCh. 12 - Prob. 1DYKBCh. 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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- What is a neuron? How does its structure enable it to perform its functions?arrow_forwardWhich functional segment of a neuron contains chemically gated channels? Which functional segments contain voltage-gated channels?arrow_forwardWhat is the role of ions, the phospholipid bilayer, and plasma membrane channels in neurons relative to the concepts of current, voltage, and resistance?arrow_forward
- When a neuron is polarized,. a) both positive and negative ions are concentrated inside the neural membrane b) positive ions are concentrated outside the neural membrane while negative ions are concentrated inside the membrane negative ions are concentrated outside the neural membrane while positive ions are concentrated inside the membrane d) both positive and negative ions are concentrated outside the neural membranearrow_forwardWhich component of the neuron sends action potentials away from the cell body?arrow_forwardWhen a neuron fires an action potential, closing of the voltage-gated Na+ channels helps to bring an end to _________. A) the depolarizing phase of the action potential B) the repolarizing phase of the action potential C) graded potential changes D) the resting potential E) vesicle fusion at the synapsearrow_forward
- What is the difference in appearance and function between dendrites and axons??arrow_forwardIdentify the primary functional roles of each part of the neuron; dendritic arbor, cell body, axon hillock, axon, and synaptic terminal.arrow_forwardWhat is the function of myelin sheaths? Where are they found?arrow_forward
- The loss of positive ions from the interior of a neuron produces, (a) depolarization. (b) threshold. (c) hyperpolarization. (d) an action potential.arrow_forward(1) Bipolar neuron (2) Multipolar neuron (3) Unipolar neuron For each neuron indicate the following structures: • Dendrite • Axon • Somal On each neuron indicate where the following functions occur: ● ● Input Integration • Outputarrow_forwardA synapse between a terminal bouton and a neuron cell body is classified as (a) axodendritic, (b) axoaxonic, (c) axosomatic, (d) axoneuronic.arrow_forward
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