Question 1

Most neurons have multiple dendrites.

Accepted Answer

A) True 
 B)False

Question 2

Place the following events of synaptic transmission at an adrenergic synapse in order: A - ATP is converted to cAMP B - The cell's metabolism is altered C - G protein binds adenylate cylase D - The G protein dissociates E - NE binds the receptor

Accepted Answer

A)   E,D,C,A,B
B)   E,D,A,C,B
C)   D,E,C,A,B
D)   D,E,A,C,BE) A) and D)
F) A) and C)

Question 3

Memories are formed by neural pathways of modified synapses.

Accepted Answer

A) True 
 B)False

Question 4

The nervous system employs exclusively electrical means to send messages,whereas the endocrine system communicates by means of chemical messengers.

Accepted Answer

A) True 
 B)False

Question 5

A myelin sheath is composed primarily of __________.

Accepted Answer

A)   lipids
B)   carbohydrates
C)   glycoproteins
D)   proteins
E)   polysaccharidesF) B) and D)
G) C) and D)

Question 6

Oligodendrocytes serve the same purpose in the CNS that satellite cells do in the PNS.

Accepted Answer

A) True 
 B)False

Question 7

In a neuron,the opening of sodium gates typically leads to __________.

Accepted Answer

A)   repolarization of the plasma membrane
B)   hyperpolarization of the plasma membrane
C)   depolarization of the plasma membrane
D)   drifting of plasma membrane voltage toward a more negative value
E)   plasma membrane voltage returning to the resting membrane potentialF) A) and E)
G) All of the above

Question 8

Which body system(s) is(are) dedicated to maintaining stable internal conditions by detecting and responding to stimuli?

Accepted Answer

A)   Nervous and endocrine
B)   Nervous
C)   Endocrine
D)   Nervous,endocrine,and integumentaryE) B) and C)
F) A) and B)

Question 9

A neuron can receive thousands of EPSPs from different neurons,and responds by triggering or not triggering an action potential.This addition and response to the net effect of postsynaptic potentials is called __________.

Accepted Answer

A)   temporal summation
B)   neural summation
C)   spatial summation
D)   neuronal coding
E)   recruitmentF) D) and E)
G) B) and C)

Question 10

About 90% of the neurons in the nervous system are __________ neurons.

Accepted Answer

A)   sensory
B)   motor
C)   afferent
D)   efferent
E)   inter-F) All of the above
G) B) and C)

Question 11

Which of the following is true regarding unmyelinated nerve fibers in the PNS?

Accepted Answer

A)   A Schwann cell folds its plasma membrane around several fibers .
B)   A Schwann cells wraps its plasma membrane around each individual fiber as it does with myelinated fibers.
C)   An oligodendrocyte cells wraps its plasma membrane around each fiber as it does with myelinated fibers.
D)   Satellite cells cluster around each axon to form a pseudo-myelin sheath.E) None of the above
F) A) and D)

Question 12

The opening of __________ gates produces an __________.

Accepted Answer

A)   chloride;IPSP
B)   sodium;IPSP
C)   calcium;IPSP
D)   potassium;EPSP
E)   calcium and sodium;IPSPF) A) and D)
G) A) and E)

Question 13

What is another name for the autonomic nervous system?

Accepted Answer

A)   Visceral sensory division
B)   Somatic sensory division
C)   Visceral motor division
D)   Somatic motor division
E)   Central nervous systemF) B) and D)
G) A) and B)

Question 14

What is the opposite of presynaptic inhibition?

Accepted Answer

A)   Coding
B)   Integration
C)   Recruitment
D)   Summation
E)   FacilitationF) A) and B)
G) A) and C)

Question 15

Conduction of a nerve impulse would be the fastest in which of the following?

Accepted Answer

A)   A large diameter myelinated fiber
B)   A small diameter myelinated fiber
C)   A large unmyelinated fiber
D)   A small unmyelinated fiber
E)   A small fiber with multiple Schwann cellsF) B) and D)
G) B) and C)

Question 16

If the potassium leak channels were suddenly blocked in a resting neuron,what would happen to its resting membrane potential?

Accepted Answer

A)   It would become more positive.
B)   It would become more negative.
C)   The RMP would be unaffected.
D)   It would hyperpolarize.E) A) and C)
F) C) and D)

Question 17

Unipolar neurons have only a single process leading away from the neurosoma.

Accepted Answer

A) True 
 B)False

Question 18

The respiratory center gathers information from a variety of sources in order to set the rate and depth of breathing.This is an example of what type of neural circuit?

Accepted Answer

A)   Convergent
B)   Divergent
C)   Reverberating
D)   Parallel after-dischargeE) A) and D)
F) A) and C)

Question 19

In PNS nerve fiber regeneration,how is a growing axon directed to its original destination?

Accepted Answer

A)   It grows within a regeneration tube.
B)   The axonal terminals grow towards the neurosoma until the two severed fragments are reunited.
C)   The axon grows a collateral that is directed by growth factors secreted by the postsynaptic neuron.
D)   Injured Schwann cells produce a trail of prostaglandins to the original destination.E) A) and B)
F) A) and C)

Question 20

What occurs during hyperpolarization of a neuron membrane?

Accepted Answer

A)   Sodium ions are entering the cells
B)   Sodium ions are leaving the cell
C)   Potassium ions are entering the cell
D)   Potassium ions are leaving the cell
E)   Both sodium and potassium ions are leaving the cellF) A) and B)
G) A) and D)

Exam 12: Nervous Tissue

What is another name for the autonomic nervous system?

Correct AnswerverifiedShow Answer

The nervous system employs exclusively electrical means to send messages,whereas the endocrine system communicates by means of chemical messengers.

Correct AnswerverifiedShow Answer

What occurs during hyperpolarization of a neuron membrane?

Correct AnswerverifiedShow Answer

Unipolar neurons have only a single process leading away from the neurosoma.

Correct AnswerverifiedShow Answer

Conduction of a nerve impulse would be the fastest in which of the following?

Correct AnswerverifiedShow Answer

If the potassium leak channels were suddenly blocked in a resting neuron,what would happen to its resting membrane potential?

Correct AnswerverifiedShow Answer

In a neuron,the opening of sodium gates typically leads to __________.

Correct AnswerverifiedShow Answer

Which body system(s) is(are) dedicated to maintaining stable internal conditions by detecting and responding to stimuli?

Correct AnswerverifiedShow Answer

Oligodendrocytes serve the same purpose in the CNS that satellite cells do in the PNS.

Correct AnswerverifiedShow Answer

What is the opposite of presynaptic inhibition?

Correct AnswerverifiedShow Answer

The respiratory center gathers information from a variety of sources in order to set the rate and depth of breathing.This is an example of what type of neural circuit?

Correct AnswerverifiedShow Answer

A myelin sheath is composed primarily of __________.

Correct AnswerverifiedShow Answer

In PNS nerve fiber regeneration,how is a growing axon directed to its original destination?

Correct AnswerverifiedShow Answer

The opening of __________ gates produces an __________.

Correct AnswerverifiedShow Answer

A neuron can receive thousands of EPSPs from different neurons,and responds by triggering or not triggering an action potential.This addition and response to the net effect of postsynaptic potentials is called __________.

Correct AnswerverifiedShow Answer

Most neurons have multiple dendrites.

Correct AnswerverifiedShow Answer

Which of the following is true regarding unmyelinated nerve fibers in the PNS?

Correct AnswerverifiedShow Answer

Memories are formed by neural pathways of modified synapses.

Correct AnswerverifiedShow Answer

About 90% of the neurons in the nervous system are __________ neurons.

Correct AnswerverifiedShow Answer

Place the following events of synaptic transmission at an adrenergic synapse in order: A - ATP is converted to cAMP B - The cell's metabolism is altered C - G protein binds adenylate cylase D - The G protein dissociates E - NE binds the receptor

Correct AnswerverifiedShow Answer

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The opening of gates produces an .

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