Question 1

The purpose of the nodes of Ranvier is to start nerve impulses.

Accepted Answer

A) True 
 B)False

Question 2

The nervous tissue that consists of myelinated axons transmitting information throughout the central nervous system is the

Accepted Answer

A)   white corpuscles.
B)   grey matter.
C)   red corpuscles.
D)   red matter.
E)   white matter.F) None of the above
G) A) and D)

Question 3

Which of the following best describes how a neuron fires?

Accepted Answer

A)   Na+ ions cross the plasma membrane, initiating a wave that travels down the axon.
B)   Vesicles carry neurotransmitters from the nucleus to the other end of the neuron.
C)   Na+ ions enter one end of the neuron and diffuse to the other end, down the axon.
D)   Neurotransmitters enter one end of the neuron and diffuse to the other end, down the axon.
E)   Neurotransmitters cross the plasma membrane, creating a wave that travels down the axon.F) B) and E)
G) B) and C)

Question 4

The part of the brain that is responsible for homeostatic control of most organs is the

Accepted Answer

A)   cerebellum.
B)   hypothalamus.
C)   medulla oblongata.
D)   pons.
E)   cerebrum.F) A) and D)
G) B) and E)

Question 5

In a neuron at rest,

Accepted Answer

A)   active transport is not occurring.
B)   sodium ions are more concentrated inside the cell than outside.
C)   very little metabolism is taking place.
D)   the inside of a neuron is positively charged as compared to the outside.
E)   potassium ions are more concentrated inside the cell than outside.F) C) and D)
G) A) and B)

Question 6

A nerve impulse travels about __________ times faster when it leaps between nodes of Ranvier than when it travels along an unmyelinated axon.

Accepted Answer

A)   5
B)   10
C)   20
D)   100
E)   50F) B) and C)
G) A) and D)

Question 7

If you read about a drug designed to lead to more release of dopamine from the synaptic terminals of certain brain neurons,you would know that the drug was designed to fix synaptic function and thus cure

Accepted Answer

A)   epilepsy.
B)   insomnia.
C)   Alzheimer disease.
D)   Huntington disease.
E)   Parkinson disease.F) D) and E)
G) A) and D)

Question 8

In a spinal cord injury,nerve signals cannot proceed past the location of the injury.A person who is paraplegic can move their head,arm,neck,and hands,but not their abdomen or legs.Which part of their spinal cord was damaged?

Accepted Answer

A)   thoracic
B)   cervical
C)   lumbar
D)   sacral
E)   coccyxF) D) and E)
G) C) and D)

Question 9

In myelinated axons,_____ ions can diffuse _____ the axon only at nodes of Ranvier.

Accepted Answer

A)   potassium; into
B)   sodium; into
C)   sodium; out of
D)   All of the answer choices are correct.E) None of the above
F) All of the above

Question 10

The cells that detect internal and external conditions are

Accepted Answer

A)   sensors.
B)   motivators.
C)   effectors.
D)   collaborators.
E)   axons.F) C) and E)
G) A) and B)

Question 11

The rounded part of a neuron containing the nucleus and mitochondria is the

Accepted Answer

A)   node of Ranvier.
B)   axon.
C)   synapse.
D)   dendrite.
E)   cell body.F) B) and C)
G) A) and C)

Question 12

Figuer: + flow across the membrane of the clam neuron C)  ability of clams to burrow D)  location from which the clams were isolated E)  species of algae fed to the clams" class="answers-bank-image d-inline" rel="preload" >

-In the figure,which of the following was the dependent variable?

Accepted Answer

A)   concentration of saxitoxin fed to the clams
B)   rate of Na+ flow across the membrane of the clam neuron
C)   ability of clams to burrow
D)   location from which the clams were isolated
E)   species of algae fed to the clamsF) B) and C)
G) A) and B)

Question 13

Saxitoxin is produced by dinoflagellates.

Accepted Answer

A) True 
 B)False

Question 14

The parasympathetic nervous system is responsible for "rest and repose" types of neural activities.

Accepted Answer

A) True 
 B)False

Question 15

Drugs called selective serotonin reuptake inhibitors (SSRIs) block reuptake of serotonin and are used to treat depression.Which of the following would occur in a patient given a SSRI?

Accepted Answer

A)   Serotonin levels would decrease in the synapse.
B)   Serotonin levels would increase in the synapse.
C)   More serotonin would be released by the neuron.
D)   Less serotonin would be released by the neuron.
E)   The neuron would switch from serotonin to another neurotransmitter.F) D) and E)
G) All of the above

Question 16

The part of the neuron that is usually a single long extension that conducts an impulse to a muscle or another neuron is the

Accepted Answer

A)   synapse.
B)   cell body.
C)   axon.
D)   dendrite.
E)   node of Ranvier.F) A) and D)
G) All of the above

Question 17

Usually nerve impulses travel from one neuron to another by

Accepted Answer

A)   neurotransmitters.
B)   action potentials.
C)   resting potentials.
D)   threshold potentials.
E)   nodes of Ranvier.F) C) and D)
G) B) and C)

Question 18

Neurotransmitters released from a presynaptic cell must travel across a tiny space called a synaptic cleft.

Accepted Answer

A) True 
 B)False

Question 19

The layered membranes that jacket the central nervous system are the

Accepted Answer

A)   grey matter.
B)   meninges.
C)   white matter.
D)   epidermis.
E)   myelin sheaths.F) A) and E)
G) C) and D)

Question 20

In a spinal cord injury,nerve signals cannot proceed past the location of the injury.A person who is quadriplegic can move their head and neck,but not their arms,abdomen,or legs.Which part of their spinal cord was damaged?

Accepted Answer

A)   thoracic
B)   lumbar
C)   cervical
D)   sacral
E)   coccyxF) A) and B)
G) A) and C)

Exam 26: The Nervous System

The part of the brain that is responsible for homeostatic control of most organs is the

Correct AnswerverifiedShow Answer

The part of the neuron that is usually a single long extension that conducts an impulse to a muscle or another neuron is the

Correct AnswerverifiedShow Answer

The rounded part of a neuron containing the nucleus and mitochondria is the

Correct AnswerverifiedShow Answer

Drugs called selective serotonin reuptake inhibitors (SSRIs) block reuptake of serotonin and are used to treat depression.Which of the following would occur in a patient given a SSRI?

Correct AnswerverifiedShow Answer

The nervous tissue that consists of myelinated axons transmitting information throughout the central nervous system is the

Correct AnswerverifiedShow Answer

In myelinated axons,_____ ions can diffuse _____ the axon only at nodes of Ranvier.

Correct AnswerverifiedShow Answer

Saxitoxin is produced by dinoflagellates.

Correct AnswerverifiedShow Answer

The layered membranes that jacket the central nervous system are the

Correct AnswerverifiedShow Answer

Neurotransmitters released from a presynaptic cell must travel across a tiny space called a synaptic cleft.

Correct AnswerverifiedShow Answer

If you read about a drug designed to lead to more release of dopamine from the synaptic terminals of certain brain neurons,you would know that the drug was designed to fix synaptic function and thus cure

Correct AnswerverifiedShow Answer

Usually nerve impulses travel from one neuron to another by

Correct AnswerverifiedShow Answer

The cells that detect internal and external conditions are

Correct AnswerverifiedShow Answer

A nerve impulse travels about __________ times faster when it leaps between nodes of Ranvier than when it travels along an unmyelinated axon.

Correct AnswerverifiedShow Answer

Figuer: -In the figure,which of the following was the dependent variable?

Correct AnswerverifiedShow Answer

Which of the following best describes how a neuron fires?

Correct AnswerverifiedShow Answer

In a spinal cord injury,nerve signals cannot proceed past the location of the injury.A person who is paraplegic can move their head,arm,neck,and hands,but not their abdomen or legs.Which part of their spinal cord was damaged?

Correct AnswerverifiedShow Answer

In a neuron at rest,

Correct AnswerverifiedShow Answer

The purpose of the nodes of Ranvier is to start nerve impulses.

Correct AnswerverifiedShow Answer

In a spinal cord injury,nerve signals cannot proceed past the location of the injury.A person who is quadriplegic can move their head and neck,but not their arms,abdomen,or legs.Which part of their spinal cord was damaged?

Correct AnswerverifiedShow Answer

The parasympathetic nervous system is responsible for "rest and repose" types of neural activities.

Correct AnswerverifiedShow Answer

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In myelinated axons,_ ions can diffuse _ the axon only at nodes of Ranvier.

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