Pearson eText Fundamentals of Anatomy & Physiology -- Instant Access (Pearson+)
11th Edition
ISBN: 9780136874089
Author: Frederic Martini, Judi Nath
Publisher: PEARSON+
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Chapter 12, Problem 22CP
Summary Introduction
To determine:
The pathway that will transmit the impulses more rapidly
Introduction:
In a chemical synapse, the signal from the axon terminal of a neuron is carried by neurotransmitters to the receptors of the postsynaptic cell. The speed of signal transmission is slow in chemical synapse as compared to electrical synapse.
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Students have asked these similar questions
Schwann cells are a type of glial cell found in the nervous system. In addition to the conduction of nerve impulses, the outermost layer called neurilemma aids in nerve development and regeneration.
Which of the following explains why the neurons in the brain cannot repair damage like the neurons in your hands or feet can?
a.
Neurons in the central nervous system lack neurilemma of Schwann cells.
b.
Neurons in the peripheral nervous system are surrounded by grey matter.
c.
Axons of the peripheral nervous system lack neurilemma of Schwann cells.
d.
Neurons in the central nervous system are surrounded by white matter.
Please answer
3) Which of the following keeps the impulse traveling in one direction down the axon?
a) inactivation of voltage-gated Na+ channels
b) the nodes of Ranvier
c) the magnitude of the action potential (+30 mV)
d) the myelin sheath
Schwann cells are a type of glial cell found in the nervous system. In addition to the conduction of nerve impulses, the outermost layer called
neurilemma aids in nerve development and regeneration.
After examining the image below, can you explain why brain cells have limited capacity for regeneration?
Human Brain Cross Section. Rajalakshmi L Nair et al.
Select one:
a. Neurons in the central nervous system lack neurilemma of Schwann cells.
O b. Neurons in the central nervous system are surrounded by white matter.
c. Axons of the peripheral nervous system lack neurilemma of Schwann cells.
d. Neurons in the peripheral nervous system are surrounded by grey matter.
Chapter 12 Solutions
Pearson eText Fundamentals of Anatomy & Physiology -- Instant Access (Pearson+)
Ch. 12 - Describe the three anatomical divisions of the...Ch. 12 - Describe the two functional divisions of the...Ch. 12 - Identify the two components of the efferent...Ch. 12 - Prob. 4CPCh. 12 - Name the structural components of a typical...Ch. 12 - Classify neurons according to their structure.Ch. 12 - Classify neurons according to their function.Ch. 12 - Prob. 8CPCh. 12 - Prob. 9CPCh. 12 - Prob. 10CP
Ch. 12 - Prob. 11CPCh. 12 - Prob. 12CPCh. 12 - Prob. 13CPCh. 12 - What effect would decreasing the concentration of...Ch. 12 - Define action potential.Ch. 12 - Identify the steps involved in the generation and...Ch. 12 - Prob. 17CPCh. 12 - Which of the following axons is myelinated: one...Ch. 12 - Prob. 19CPCh. 12 - Prob. 20CPCh. 12 - What effect would blocking voltage-gated calcium...Ch. 12 - Prob. 22CPCh. 12 - Prob. 23CPCh. 12 - Prob. 24CPCh. 12 - Prob. 25CPCh. 12 - Prob. 26CPCh. 12 - Prob. 27CPCh. 12 - LEVEL 1 Reviewing Facts and Terms 1. Label the...Ch. 12 - Prob. 2RQCh. 12 - Prob. 3RQCh. 12 - Prob. 4RQCh. 12 - The neural cells responsible for the analysis of...Ch. 12 - Depolarization of a neuron plasma membrane will...Ch. 12 - Prob. 7RQCh. 12 - Receptors that bind acetylcholine at the...Ch. 12 - What are the major components of (a) the central...Ch. 12 - Prob. 10RQCh. 12 - Prob. 11RQCh. 12 - If the resting membrane potential of a neuron is...Ch. 12 - Prob. 13RQCh. 12 - What is the difference between anterograde flow...Ch. 12 - What is the functional difference among chemically...Ch. 12 - State the all-or-none principle cf action...Ch. 12 - Prob. 17RQCh. 12 - Prob. 18RQCh. 12 - What are the structural and functional differences...Ch. 12 - Describe the events that occur during nerve...Ch. 12 - Prob. 21RQCh. 12 - Prob. 22RQCh. 12 - Prob. 23RQCh. 12 - In multiple sclerosis, there is intermittent and...Ch. 12 - Prob. 25RQCh. 12 - Which cells of the CNS are targeted by the polio...Ch. 12 - Prob. 2CC
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- The backflow of a nerve impulse is prevented by the fact that at a chemical synapse, the axon terminal does not have neurotransmitter receptors and dendrites cannot secrete neurotransmitter chemicals. What does this statement tell you about the direction of nerve impulses in neurons?arrow_forwardWhich of the following is depicted in the diagram? A) Somatic nervous system B) spinal reflex arc C) sympathetic nervous system D) parasympathetic nervous systemarrow_forwardWhich 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 cleftarrow_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_forwardWhen expert pianists listen to familiar, well-practiced music, they imagine the finger movements, and the finger area of their motor cortex becomes active, even if they are not moving their fingers (Haueisen & Knösche, 2001). If we regard those neurons as another kind of mirror neuron, what do these results imply about the origin of mirror neurons?arrow_forwardWhen a neuron receives signals from other neurons, the signals arrive at the axon hillock in the form of ________. A) graded potential changes B) action potentials C) calcium ions D) ATP E) RNAarrow_forward
- Describe the location of each of the following: a) Cells of the nervous system: Location of Neuroglia b) Location of vascular tissue (in humans)arrow_forwardSchwann cells are a type of glial cell found in the nervous system. In addition to the conduction of nerve impulses, the outermost layer called neurilemma aids in nerve development and regeneration. Which of the following explains why the neurons in the brain cannot repair damage like the neurons in your hands or feet can?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 function of the sodium-potassium pump during the nerve impulse transmission? Which is the ratio of Na-K with inside/outside the cell?arrow_forwarda) How does E allow faster transmission of signals? b) What would happen if G has a lack of Calcium? c) Most neurons have the style of junction (chemical) shown in the diagram, rather than gap (electrical) junctions. Why does this make sense?arrow_forwardwhich is not true of neurotransmitters? a) they cross the membrane through the channels and carry electrical signals down the length of the axon b) dopamine and serotonin are neurotransmitters c) they are released by axon terminals into the synaptic cleft?arrow_forward
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