Question 1

Which occurs first?

Accepted Answer

A)   Absolute refractory period
B)   Relative refractory periodC) A) and B)
D) undefined

Question 2

Voltage-gated sodium channels at a neuron's initial segment are triggered to open when the membrane becomes more positive.

Accepted Answer

A) True 
 B)False

Question 3

Based on function, the vast majority of neurons are

Accepted Answer

A)   sensory neurons.
B)   motor neurons.
C)   unipolar neurons.
D)   bipolar neurons.
E)   interneurons.F) A) and E)
G) C) and E) E

Question 4

Saltatory conduction occurs in

Accepted Answer

A)   myelinated axons, where action potentials occur only at neurofibril nodes.
B)   myelinated axons, where action potentials occur only under the myelin sheath.
C)   myelinated axons, where action potentials occur continuously down the entire axon.
D)   unmyelinated axons, where action potentials occur continuously down the entire axon.
E)   the axon terminal, where full-size action potentials occur at the hillock.F) B) and D)
G) A) and D)

Question 5

When a neurotransmitter causes the opening of chemically gated potassium channels on the postsynaptic cell, the postsynaptic potential that results is an

Accepted Answer

A)   EPSP, which is a depolarization.
B)   EPSP, which is a hyperpolarization
C)   IPSP, which is a depolarization.
D)   IPSP, which is a hyperpolarization.E) A) and B)
F) All of the above

Question 6

The glial cell that protects neuron cell bodies located within ganglia is the

Accepted Answer

A)   satellite cell.
B)   ependymal cell.
C)   neurolemmocyte.
D)   astrocyte.
E)   oligodendrocyte.F) None of the above
G) A) and B)

Question 7

The function of myelin is to

Accepted Answer

A)   block the transmission of a nerve impulse.
B)   provide points of attachment for nerve threads.
C)   produce faster nerve impulse propagation.
D)   produce slow but continuous impulse conduction.E) A) and C)
F) A) and D)

Question 8

The type of voltage-gated channel that possesses an inactivation gate that temporarily closes after the channel is active is the

Accepted Answer

A)   voltage-gated potassium channel.
B)   voltage-gated sodium channel.
C)   voltage-gated calcium channel.
D)   voltage-gated chloride channel.E) A) and B)
F) A) and C)

Question 9

Which statement is true regarding the action of an oligodendrocyte?

Accepted Answer

A)   Each oligodendrocyte can form a myelin sheath around many axons simultaneously.
B)   An oligodendrocyte is responsible for forming part of the blood-brain barrier.
C)   Oligodendrocytes function only within the PNS.
D)   Each oligodendrocyte can wrap only a 1-mm portion of a single axon.
E)   A neurolemmocyte attacks pathogens.F) A) and B)
G) None of the above

Question 10

What type of circuit would you use to solve a higher-order mathematical problem?

Accepted Answer

A)   Converging
B)   Diverging
C)   Reverberating
D)   Parallel-after-discharge
E)   None of the choices is correct.F) A) and D)
G) A) and C)

Question 11

When a nerve impulse reaches the transmissive segment of a neuron,

Accepted Answer

A)   calcium is pumped into the neuron and neurotransmitter diffuses out through channels.
B)   calcium is released from the neuron along with neurotransmitter from synaptic vesicles.
C)   calcium diffuses into the neuron and neurotransmitter is released by exocytosis.
D)   calcium and neurotransmitter diffuse into the synaptic knob.
E)   calcium is immediately pumped out of the neuron and vesicles of neurotransmitter undergo phagocytosis.F) A) and B)
G) A) and C)

Question 12

The nervous system contains more neurons than glial cells.

Accepted Answer

A) True 
 B)False

Question 13

What is the most abundant glial cell in the CNS?

Accepted Answer

A)   Astrocyte
B)   Ependymal cell
C)   Neurolemmocyte
D)   Microglial cell
E)   OligodendrocyteF) A) and B)
G) None of the above

Question 14

A sensory neuron detecting an intense stimulus will generate action potentials of greater strength as compared to a sensory neuron detecting a weak stimulus.

Accepted Answer

A) True 
 B)False

Question 15

A depolarization is when the inside of a neuron becomes ________ the resting membrane potential.

Accepted Answer

A)   more negative than
B)   less negative than
C)   closer toD) A) and B)
E) B) and C)

Question 16

You walk into a restaurant and amidst the sights, sounds, and smells of food preparation, you notice that you have begun to salivate. This is evidence that a particular neuronal circuit has been activated. Which one?

Accepted Answer

A)   Converging
B)   Diverging
C)   Reverberating
D)   Parallel-after-discharge
E)   None of the choices is correct.F) B) and E)
G) D) and E)

Question 17

In a myelinated axon, the greatest concentration of voltage-gated ion channels is in the

Accepted Answer

A)   myelinated regions.
B)   neurofibril nodes.C) A) and B)
D) undefined

Question 18

The axon hillock makes up the ________ segment of a neuron.

Accepted Answer

initial

Question 19

A postsynaptic potential is a graded potential.

Accepted Answer

A) True 
 B)False

Question 20

Of the two types of synapses, based on mode of communication, which is less common but allows faster signal transmission?

Accepted Answer

A)   Chemical synapse
B)   Mechanical synapse
C)   Physical synapse
D)   Magnetic synapse
E)   Electrical synapseF) A) and B)
G) D) and E) E

Exam 12: Nervous System: Nervous Tissue

Which occurs first?

Correct AnswerverifiedShow Answer

Voltage-gated sodium channels at a neuron's initial segment are triggered to open when the membrane becomes more positive.

Correct AnswerverifiedShow Answer

Based on function, the vast majority of neurons are

Correct AnswerverifiedE

Saltatory conduction occurs in

Correct AnswerverifiedShow Answer

When a neurotransmitter causes the opening of chemically gated potassium channels on the postsynaptic cell, the postsynaptic potential that results is an

Correct AnswerverifiedShow Answer

The glial cell that protects neuron cell bodies located within ganglia is the

Correct AnswerverifiedShow Answer

The function of myelin is to

Correct AnswerverifiedShow Answer

The type of voltage-gated channel that possesses an inactivation gate that temporarily closes after the channel is active is the

Correct AnswerverifiedShow Answer

Which statement is true regarding the action of an oligodendrocyte?

Correct AnswerverifiedShow Answer

What type of circuit would you use to solve a higher-order mathematical problem?

Correct AnswerverifiedShow Answer

When a nerve impulse reaches the transmissive segment of a neuron,

Correct AnswerverifiedShow Answer

The nervous system contains more neurons than glial cells.

Correct AnswerverifiedShow Answer

What is the most abundant glial cell in the CNS?

Correct AnswerverifiedShow Answer

A sensory neuron detecting an intense stimulus will generate action potentials of greater strength as compared to a sensory neuron detecting a weak stimulus.

Correct AnswerverifiedShow Answer

A depolarization is when the inside of a neuron becomes ________ the resting membrane potential.

Correct AnswerverifiedShow Answer

You walk into a restaurant and amidst the sights, sounds, and smells of food preparation, you notice that you have begun to salivate. This is evidence that a particular neuronal circuit has been activated. Which one?

Correct AnswerverifiedShow Answer

In a myelinated axon, the greatest concentration of voltage-gated ion channels is in the

Correct AnswerverifiedShow Answer

The axon hillock makes up the ________ segment of a neuron.

Correct Answerverifiedinitial

A postsynaptic potential is a graded potential.

Correct AnswerverifiedShow Answer

Of the two types of synapses, based on mode of communication, which is less common but allows faster signal transmission?

Correct AnswerverifiedE

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
E

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
initial

Correct Answer
verified

Correct Answer
verified
E