Question 1

Damage to the pons would lead to problems with posture.

Accepted Answer

A) True 
 B)False

Question 2

The three types of neurons in the nervous system of humans are

Accepted Answer

A)   interneurons, synaptic neurons, and neuroglia.
B)   synaptic neurons, motor neurons, and Schwann cells.
C)   sensory neurons, interneurons, and motor neurons.
D)   Schwann cells, sensory neurons, and neuroglia.
E)   synaptic neurons, motor neurons, and sensory neurons.F) A) and D)
G) B) and C)

Question 3

A graded potential allows for variable,rather than all-or-none responses,in neurons.

Accepted Answer

A) True 
 B)False

Question 4

Impaired vision after a blow to the head implies damage to the vision processing center in the brain,which is what region?

Accepted Answer

A)   frontal lobe
B)   parietal lobe
C)   temporal lobe
D)   occipital lobe
E)   brainstemF) C) and D)
G) B) and C)

Question 5

The connection point between an interneuron and a motor neuron is a synapse.

Accepted Answer

A) True 
 B)False

Question 6

The reason that we can tell light from sound is because different neurons transmit these different stimuli.

Accepted Answer

A) True 
 B)False

Question 7

If you wanted to surgically disrupt the part of a neuron which conducts the nerve impulse,you would cut what part of the neuron?

Accepted Answer

A)   dendrite
B)   axon
C)   trigger zone
D)   cell body
E)   Schwann cellsF) All of the above
G) A) and B)

Question 8

The division of the peripheral nervous system that carries signals to voluntary muscles is the _____ system.

Accepted Answer

A)   somatic
B)   autonomic
C)   sympathetic
D)   parasympathetic
E)   None of the answer choices are correct.F) A) and E)
G) C) and E)

Question 9

The nervous tissue of the central nervous system that consists of neuron cell bodies and synapses is the

Accepted Answer

A)   white matter.
B)   white corpuscles.
C)   gray matter.
D)   red corpuscles.
E)   red matter.F) A) and E)
G) C) and D)

Question 10

Unmyelinated regions between adjacent myelin sheath cells are called synaptic clefts.

Accepted Answer

A) True 
 B)False

Question 11

A nerve impulse does not spread backwards because of a refractory period in which the membrane reestablishes its resting potential and cannot generate another action potential.

Accepted Answer

A) True 
 B)False

Question 12

The part of the neuron that is usually highly branched and receives input from other neurons is the

Accepted Answer

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

Question 13

Figuer: + transporter by saxitoxin.Which of the following would occur in sensitive clam cells that have been exposed to saxitoxin? A)  Na+ ions would no longer be able to leave a neuron by facilitated diffusion. B)  Na+ ions would no longer be able to leave a neuron by active transport. C)  Na+ ions would no longer be able to enter a neuron by active transport. D)  Na+ ions would no longer be able to enter a neuron by facilitated diffusion. E)  Na+ ions would no longer be used by neurons." class="answers-bank-image d-inline" rel="preload" >

-In the figure,the researchers measured a clam's ability to burrow as an indicator of paralysis due to inhibition of a Na+ transporter by saxitoxin.Which of the following would occur in sensitive clam cells that have been exposed to saxitoxin?

Accepted Answer

A)   Na+ ions would no longer be able to leave a neuron by facilitated diffusion.
B)   Na+ ions would no longer be able to leave a neuron by active transport.
C)   Na+ ions would no longer be able to enter a neuron by active transport.
D)   Na+ ions would no longer be able to enter a neuron by facilitated diffusion.
E)   Na+ ions would no longer be used by neurons.F) D) and E)
G) A) and E)

Question 14

A neuronn must reach threshold potential before an action potential begins.

Accepted Answer

A) True 
 B)False

Question 15

The division of the nervous system that integrates sensory information and coordinates the body's response is the _____ nervous system.

Accepted Answer

A)   peripheral
B)   central
C)   somatic
D)   autonomic
E)   sympatheticF) A) and E)
G) D) and E)

Question 16

Nodes of Ranvier are intervals between Schwann cells that _____ the conduction of nerve impulses.

Accepted Answer

A)   slow
B)   have no effect on
C)   trigger
D)   speed
E)   completely blockF) A) and B)
G) A) and C)

Question 17

A drug designed to stop neurons from recharging would block the step in which ions

Accepted Answer

A)   are actively pumped against their concentration gradient.
B)   spontaneously move down their concentration gradient.
C)   spontaneously move against their concentration gradient.
D)   are actively pumped down their concentration gradient.E) B) and D)
F) A) and B)

Question 18

On an axon,the small spacings between the insulation surrounding the axon are called

Accepted Answer

A)   trigger zones.
B)   axons.
C)   synapses.
D)   dendrites.
E)   nodes of Ranvier.F) A) and E)
G) C) and D)

Question 19

How would exposure to saxitoxin from algae cause changes in clam populations?

Accepted Answer

A)   Saxitoxin would cause mutations to occur in the clam's DNA.
B)   Saxitoxin would increase the mutation rates in clams.
C)   Saxitoxin would select existing mutations in the clam population.
D)   Clams sensitive to saxitoxin would migrate away from the algae bloom.
E)   Clams would want to change their Na+ transporters to become resistant to saxitoxin.F) C) and D)
G) A) and E)

Question 20

If you were trying to build a mechanical model of a neuron,in terms of magnitude and kind,while not transmitting a signal,you would want the model to have a(n)

Accepted Answer

A)   action potential of −70 mV.
B)   resting potential of −70 mV.
C)   resting potential of +35 mV.
D)   action potential of +35 mV.
E)   action potential of +70 mV.F) All of the above
G) B) and C)

Exam 26: The Nervous System

The division of the nervous system that integrates sensory information and coordinates the body's response is the _____ nervous system.

Correct AnswerverifiedShow Answer

How would exposure to saxitoxin from algae cause changes in clam populations?

Correct AnswerverifiedShow Answer

The division of the peripheral nervous system that carries signals to voluntary muscles is the _____ system.

Correct AnswerverifiedShow Answer

Nodes of Ranvier are intervals between Schwann cells that _____ the conduction of nerve impulses.

Correct AnswerverifiedShow Answer

The nervous tissue of the central nervous system that consists of neuron cell bodies and synapses is the

Correct AnswerverifiedShow Answer

Unmyelinated regions between adjacent myelin sheath cells are called synaptic clefts.

Correct AnswerverifiedShow Answer

A neuronn must reach threshold potential before an action potential begins.

Correct AnswerverifiedShow Answer

The reason that we can tell light from sound is because different neurons transmit these different stimuli.

Correct AnswerverifiedShow Answer

On an axon,the small spacings between the insulation surrounding the axon are called

Correct AnswerverifiedShow Answer

The part of the neuron that is usually highly branched and receives input from other neurons is the

Correct AnswerverifiedShow Answer

The connection point between an interneuron and a motor neuron is a synapse.

Correct AnswerverifiedShow Answer

If you wanted to surgically disrupt the part of a neuron which conducts the nerve impulse,you would cut what part of the neuron?

Correct AnswerverifiedShow Answer

A drug designed to stop neurons from recharging would block the step in which ions

Correct AnswerverifiedShow Answer

Damage to the pons would lead to problems with posture.

Correct AnswerverifiedShow Answer

A nerve impulse does not spread backwards because of a refractory period in which the membrane reestablishes its resting potential and cannot generate another action potential.

Correct AnswerverifiedShow Answer

If you were trying to build a mechanical model of a neuron,in terms of magnitude and kind,while not transmitting a signal,you would want the model to have a(n)

Correct AnswerverifiedShow Answer

Impaired vision after a blow to the head implies damage to the vision processing center in the brain,which is what region?

Correct AnswerverifiedShow Answer

A graded potential allows for variable,rather than all-or-none responses,in neurons.

Correct AnswerverifiedShow Answer

Figuer: -In the figure,the researchers measured a clam's ability to burrow as an indicator of paralysis due to inhibition of a Na+ transporter by saxitoxin.Which of the following would occur in sensitive clam cells that have been exposed to saxitoxin?

Correct AnswerverifiedShow Answer

The three types of neurons in the nervous system of humans are

Correct AnswerverifiedShow Answer

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Figuer: -In the figure,the researchers measured a clam's ability to burrow as an indicator of paralysis due to inhibition of a Na⁺ transporter by saxitoxin.Which of the following would occur in sensitive clam cells that have been exposed to saxitoxin?

Correct Answer
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Correct Answer
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