Question 1

Like all cells, the neurons' internal organization dictates its function. Neurons have relatively many mitochondria, an extensive network of rough endoplasmic reticulum and many clusters of ribosomes. These cellular features indicate all of the following EXCEPT___________ .

Accepted Answer

A)   neurons must meet a high demand for ATP
B)   neurons produce many proteins
C)   neurons have stable, relatively unchanging internal environments
D)   neurons have a relatively high consumption of oxygenE) All of the above
F) A) and C)

Question 2

The part of the nervous system that conducts impulses from the CNS to the skeletal muscles is the_________nervous system.

Accepted Answer

The answer of The part of the nervous system that...

Question 3

Which of the following is NOT a function of dendrites?

Accepted Answer

A)   produce short-distance signals called graded potentials
B)   generate nerve impulses and transmit them away from the cell body
C)   provide enormous surface area for receiving signals from other neurons
D)   convey incoming messages toward the cell bodyE) B) and C)
F) A) and D)

Question 4

An action potential is regarded as an example of a positive feedback. Which of the following examples below best illustrates the positive feedback aspect of an action potential?

Accepted Answer

A)   Potassium permeability is about 25 times greater than sodium ions.
B)   Voltage gated potassium ion channels open slowly and remain open long enough to cause hyperpolarization.
C)   A threshold stimulus will cause the opening of voltage gated sodium ion channels that will cause further depolarizing stimulus. This stimulus will open still more voltage gated sodium ion channels.
D)   The sodium potassium pump consistently moves ions as long as ATP is available, and regardless of membrane potential changes.E) B) and C)
F) All of the above

Question 5

Which of the following correctly describes a graded potential?

Accepted Answer

A)   It has a depolarization, repolarization, and hyperpolarization phase.
B)   It can have amplitudes of various sizes.
C)   It travels long distances.
D)   It is initiated by voltage changes in the membrane.E) C) and D)
F) B) and D)

Question 6

Which of the following is NOT true of graded potentials?

Accepted Answer

A)   They can be called postsynaptic potentials.
B)   They increase amplitude as they move away from the stimulus point.
C)   They are short-lived.
D)   They can form on receptor endings.E) B) and D)
F) B) and C)

Question 7

When information is delivered within the CNS simultaneously by different parts of the neural pathway, the process is called __________ processing.

Accepted Answer

The answer of When information is delivered within the CNS...

Question 8

Nerve impulses leading to the brain carry information about cool temperatures on the skin. The nerve fibers sending these signals will most likely belong to which division of the nervous system?

Accepted Answer

A)   sensory (afferent)  division
B)   somatic nervous system
C)   sympathetic division
D)   parasympathetic divisionE) A) and C)
F) B) and C)

Question 9

Which of the following is false or incorrect?

Accepted Answer

A)   An excitatory postsynaptic potential occurs if the excitatory effect is greater than the inhibitory effect but less than threshold.
B)   An inhibitory postsynaptic potential occurs if the inhibitory effect is greater than the excitatory, causing hyperpolarization of the membrane.
C)   A nerve impulse occurs if the excitatory and inhibitory effects are equal.D) All of the above
E) None of the above

Question 10

During depolarization, the inside of the neuron's membrane becomes less negative.

Accepted Answer

A) True 
 B)False

Question 11

Meningitis can be caused by infection of the central nervous system by bacteria. Which cells would be most responsible for removing the infection?

Accepted Answer

A)   microglia
B)   satellite cells
C)   oligodendrocytes
D)   Schwann cellsE) None of the above
F) All of the above

Question 12

The action potential is caused by permeability changes in the plasma membrane.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following is an excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle?

Accepted Answer

A)   gamma aminobutyric acid
B)   cholinesterase
C)   norepinephrine
D)   acetylcholineE) B) and D)
F) C) and D)

Question 14

Collections of nerve cell bodies outside the central nervous system are called_________ .

Accepted Answer

A)   nuclei
B)   ganglia
C)   nerves
D)   tractsE) B) and C)
F) B) and D)

Question 15

These cells in the CNS have cilia that move in order to circulate cerebrospinal fluid.

Accepted Answer

A)   ependymal cells
B)   astrocytes
C)   Schwann cells
D)   oligodendrocytesE) A) and B)
F) A) and C)

Question 16

Reflexes are rapid, automatic responses to stimuli that will produce the same effect every time.

Accepted Answer

A) True 
 B)False

Question 17

A second nerve impulse cannot be generated until _________.

Accepted Answer

A)   the Na ions have been pumped back into the cell
B)   proteins have been resynthesized
C)   the membrane potential has been reestablished
D)   all sodium gates are closedE) A) and D)
F) A) and C)

Question 18

When a neurotransmitter like acetylcholine is acting in an excitatory manner which of the following is likely a result of the acetylcholine acting on the postsynaptic cell?

Accepted Answer

A)   Chemically gated sodium channels will open.
B)   Chemically gated sodium channels will be closed.
C)   Chemically gated potassium channels will open.
D)   Chemically gated chloride channels will open.E) All of the above
F) B) and D)

Question 19

What is the difference between a direct acting neurotransmitter and an indirect acting neurotransmitter?

Accepted Answer

Direct acting neurotransmitter...

Question 20

Schwann cells are functionally similar to __________.

Accepted Answer

A)   oligodendrocytes
B)   ependymal cells
C)   astrocytes
D)   microgliaE) All of the above
F) A) and B)

Exam 11: Fundamentals of the Nervous System and Nervous Tissue

What is the difference between a direct acting neurotransmitter and an indirect acting neurotransmitter?

Correct AnswerverifiedDirect acting neurotransmitter...View AnswerShow Answer

Schwann cells are functionally similar to __________.

Correct AnswerverifiedShow Answer

When a neurotransmitter like acetylcholine is acting in an excitatory manner which of the following is likely a result of the acetylcholine acting on the postsynaptic cell?

Correct AnswerverifiedShow Answer

Which of the following is NOT true of graded potentials?

Correct AnswerverifiedShow Answer

An action potential is regarded as an example of a positive feedback. Which of the following examples below best illustrates the positive feedback aspect of an action potential?

Correct AnswerverifiedShow Answer

Which of the following is an excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle?

Correct AnswerverifiedShow Answer

Meningitis can be caused by infection of the central nervous system by bacteria. Which cells would be most responsible for removing the infection?

Correct AnswerverifiedShow Answer

Reflexes are rapid, automatic responses to stimuli that will produce the same effect every time.

Correct AnswerverifiedShow Answer

Nerve impulses leading to the brain carry information about cool temperatures on the skin. The nerve fibers sending these signals will most likely belong to which division of the nervous system?

Correct AnswerverifiedShow Answer

These cells in the CNS have cilia that move in order to circulate cerebrospinal fluid.

Correct AnswerverifiedShow Answer

Collections of nerve cell bodies outside the central nervous system are called_________ .

Correct AnswerverifiedShow Answer

Which of the following correctly describes a graded potential?

Correct AnswerverifiedShow Answer

During depolarization, the inside of the neuron's membrane becomes less negative.

Correct AnswerverifiedShow Answer

Which of the following is NOT a function of dendrites?

Correct AnswerverifiedShow Answer

The part of the nervous system that conducts impulses from the CNS to the skeletal muscles is the_________nervous system.

Correct AnswerverifiedShow Answer

Which of the following is false or incorrect?

Correct AnswerverifiedShow Answer

Like all cells, the neurons' internal organization dictates its function. Neurons have relatively many mitochondria, an extensive network of rough endoplasmic reticulum and many clusters of ribosomes. These cellular features indicate all of the following EXCEPT___________ .

Correct AnswerverifiedShow Answer

The action potential is caused by permeability changes in the plasma membrane.

Correct AnswerverifiedShow Answer

A second nerve impulse cannot be generated until _________.

Correct AnswerverifiedShow Answer

When information is delivered within the CNS simultaneously by different parts of the neural pathway, the process is called __________ processing.

Correct AnswerverifiedShow Answer

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Direct acting neurotransmitter...
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