Which of the following is true about the myelin sheath in a nerve cell quizlet?

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Which of the following is true about myelin sheath in a nerve cell?
What is true about the myelin sheath?
What is the function of the myelin sheath on a neuron quizlet?
What are the 3 functions of the myelin sheath?

Hole's Human Anatomy and Physiology

13th EditionDavid N. Shier, Jackie L. Butler, Ricki Lewis

1,402 solutions

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15th EditionDavid Shier, Jackie Butler, Ricki Lewis

1,950 solutions

Human Anatomy and Physiology Laboratory Manual, Main Version

11th EditionLori A. Smith

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861 solutions

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Terms in this set (185)

Which best describes a nerve?
A. dendrites, cell bodies, axons, Schwann cells
B. dendrites, cell bodies, axon hillock, axon terminals, vesicles
C. dendrites, cell bodies, axon hillock, axon terminals, Schwann cells,
neurotransmitters
D. axons, blood vessels, connective tissue, Schwann cells

The sequence of events that constitute an action potential is correctly described
by which of the following? Resting potential of.....
A. +35 mV, stimulus above the threshold, Na + move into cell, depolarisation to
−70 mV, K + move out of cell, repolarisation to +35 mV.
B. −70 mV, stimulus above the threshold, K + move into cell, depolarisation to
−35 mV, Na + move out of cell, repolarisation to −70 mV.
C. +35 mV, stimulus above the threshold, K + move into cell, depolarisation to
−70 mV, Na + move out of cell, repolarisation to +35 mV.
D. −70 mV, stimulus above the threshold, Na + move into cell, depolarisation to
+35 mV, K + move out of cell, repolarisation to −70 mV.

Which of the lists of structures include all of the central nervous system?
A. cerebellum, cerebrum, spinal cord, diencephalon, brainstem
B. midbrain, spinal cord, autonomic nerves, pons, diencephalon
C. midbrain, cerebellum, special sense organs, medulla oblongata
D. cerebrum, sensory neurons, motor neurons, cerebellum

What are the three meninges and two named "spaces" that surround the brain,
in order from superfi cial to deep (outermost to innermost)?
A. pia, arachnoid, sub-arachnoid, dura, septa
B. sub-arachnoid, epidural, dura, pia, arachnoid
C. arachnoid, sun-arachnoid, pia, epidural, dura
D. epidural, dura, arachnoid, sub-arachnoid, pia

Which of the following structures together make up the brainstem?
A. medulla oblongata, pons, midbrain, cerebellum
B. medulla oblongata, pons, midbrain
C. medulla oblongata, pons, midbrain, thalamus
D. medulla oblongata, pons, midbrain, pineal gland

Which of the following lists all of the main sections of the brain?
A. cerebrum, brainstem, midbrain, medulla oblongata
B. cerebrum, cerebral cortex, cerebellum, mesencephalon
C. cerebellum, diencephalon, brainstem, cerebrum
D. cerebral cortex, midbrain, diencephalon, cerebellum

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Which of the following is true about myelin sheath in a nerve cell?

The following statement is true: c) It is necessary for saltatory conduction. Myelin wraps around the axon of a neuron. It serves to increase the speed of conduction by insulating the axon.

What is true about the myelin sheath?

Myelin is an insulating layer, or sheath that forms around nerves, including those in the brain and spinal cord. It is made up of protein and fatty substances. This myelin sheath allows electrical impulses to transmit quickly and efficiently along the nerve cells. If myelin is damaged, these impulses slow down.

What is the function of the myelin sheath on a neuron quizlet?

The primary function of the myelin sheath is to: insulate the axon and increase the speed at which neurons convey their message. Compared to neurons that do not have myelin, neurons with myelin: can communicate up to 20 times faster.

What are the 3 functions of the myelin sheath?

Function of the Myelin Sheath The myelin sheath has a number of function in the nervous system. The main functions include protecting the nerves from other electrical impulses, and speeding the time it takes for a nerve to traverse an axon. Unmyelinated nerves must send a wave down the entire length of the nerve.