Question 1

Which of the following is the primary second messenger in G-protein coupled post-synaptic cells?

Accepted Answer

A)   NO
B)   CO
C)   cAMP
D)   GABA
E)   ATPF) B) and D)
G) None of the above

Question 2

Which of the following is the most important excitatory neurotransmitter in the brain that is importantinlearning and memory?

Accepted Answer

A)   glutamate
B)   gamma aminobutyric acid
C)   serotonin
D)   noradrenaline
E)   glycineF) B) and E)
G) B) and D)

Question 3

Functions of astrocytes include all of the following except

Accepted Answer

A)   maintaining the blood-brain barrier.
B)   conducting action potentials.
C)   guiding neuron development.
D)   responding to neural tissue damage.
E)   forming a three-dimensional framework for the CNS.F) C) and D)
G) A) and E)

Question 4

Ion channels that are always open are called ________ channels.

Accepted Answer

A)   active
B)   gated
C)   leak
D)   regulated
E)   localF) All of the above
G) A) and E)

Question 5

Figure 12-1 The Neuron
 
Use Figure 12-1 to answer the following questions:
-The structure labeled "2" is a(n)

Accepted Answer

A)   neurofilament.
B)   dendrite.
C)   initial segment.
D)   perikaryon.
E)   axon.F) A) and D)
G) A) and C)

Question 6

________ carry sensory information to the CNS.

Accepted Answer

A)   Motor neurons
B)   Efferent neurons
C)   Multipolar neurons
D)   Afferent neurons
E)   InterneuronsF) A) and B)
G) A) and C)

Question 7

Figure 12-1 The Neuron
 
Use Figure 12-1 to answer the following questions:
-What is contained inside the structure labeled "5"?

Accepted Answer

A)   neuroglia
B)   sodium ions
C)   acetylcholinesterase
D)   calcium ions
E)   neurotransmitter moleculesF) A) and D)
G) C) and D)

Question 8

Figure 12-1 The Neuron
 
Use Figure 12-1 to answer the following questions:
-The structures labeled "1" are dendrites. Their membranes contain numerous chemically-gated ion channels.

Accepted Answer

A)   The first statement is true but the second statement is false.
B)   The first statement is false but the second statement is true.
C)   Both statements are true.
D)   Both statements are false.E) None of the above
F) All of the above

Question 9

Adrug that blocks ATP production is introduced into an isolated axon preparation. The axon is then repeatedly stimulated, and recordings are made of the response. What effects would you expect to observe?

Accepted Answer

Initially, the recording would show norm...

Question 10

Which of the following is not a function of the neuroglia?

Accepted Answer

A)   support
B)   memory
C)   secretion of cerebrospinal fluid
D)   maintenance of blood-brain barrier
E)   phagocytosisF) A) and D)
G) C) and D)

Question 11

Which of the following neurotransmitters are known to bind to G-protein coupled receptors?

Accepted Answer

A)   epinephrine
B)   serotonin
C)   dopamine
D)   GABA
E)   All of these bind to G-protein coupled receptors.F) A) and B)
G) A) and C)

Question 12

Clusters of RER and free ribosomes in neurons are called

Accepted Answer

A)   neurofilaments.
B)   neurofibrils.
C)   perikaryon.
D)   Nissl bodies.
E)   microglia.F) A) and E)
G) None of the above

Question 13

In a(n)  ________ synapse, current flows directly between cells.

Accepted Answer

A)   electrical
B)   cell
C)   chemical
D)   osmotic
E)   gapF) B) and D)
G) B) and C)

Question 14

Figure 12-2 The Nerve Action Potential
 
Use Figure 12-2 to answer the following questions:
-Which area of the graph shows when chemically gated sodium channels are open?

Accepted Answer

A)   3
B)   1
C)   2
D)   5
E)   4F) B) and C)
G) A) and E)

Question 15

The most common neuron of the nervous system is the

Accepted Answer

A)   interneuron.
B)   externoceptor.
C)   bipolar neuron.
D)   unipolar neuron.
E)   microglial cell.F) All of the above
G) B) and C)

Question 16

Which of the following is not a recognized structural classification for neurons?

Accepted Answer

A)   anaxonic
B)   bipolar
C)   multipolar
D)   pseudopolar
E)   unipolarF) B) and E)
G) B) and D)

Question 17

When a second EPSP (excitatory postsynaptic potential)  arrives at a single synapse before the effects of the first have disappeared, what occurs?

Accepted Answer

A)   spatial summation
B)   temporal summation
C)   inhibition of the impulse
D)   hyperpolarization
E)   decrease in speed of impulse transmissionF) A) and B)
G) A) and C)

Question 18

Which of the following does not influence the time necessary for a nerve impulse to be transmitted?

Accepted Answer

A)   length of the axon
B)   presence or absence of a myelin sheath
C)   diameter of the axon
D)   presence or absence of nodes
E)   whether or not the impulse begins in the CNSF) B) and D)
G) None of the above

Question 19

If the permeability of a resting axon to sodium ion increases,

Accepted Answer

A)   the membrane potential will repolarize.
B)   the membrane potential will hyperpolarize.
C)   inward movement of sodium ion will increase.
D)   outward movement of sodium ion will decrease.
E)   inward movement of sodium will increase and the membrane will depolarize.F) B) and D)
G) A) and B)

Question 20

The sum of the electrical and chemical forces acting on an ion is known as its

Accepted Answer

A)   permeability gradient.
B)   thermodynamic difference.
C)   electrochemical gradient.
D)   action potential.
E)   summation difference.F) A) and E)
G) A) and C)

Exam 12: Nervous Tissue

Which of the following neurotransmitters are known to bind to G-protein coupled receptors?

Correct AnswerverifiedShow Answer

In a(n) ________ synapse, current flows directly between cells.

Correct AnswerverifiedShow Answer

Figure 12-2 The Nerve Action Potential Use Figure 12-2 to answer the following questions: -Which area of the graph shows when chemically gated sodium channels are open?

Correct AnswerverifiedShow Answer

Clusters of RER and free ribosomes in neurons are called

Correct AnswerverifiedShow Answer

Figure 12-1 The Neuron Use Figure 12-1 to answer the following questions: -The structures labeled "1" are dendrites. Their membranes contain numerous chemically-gated ion channels.

Correct AnswerverifiedShow Answer

Adrug that blocks ATP production is introduced into an isolated axon preparation. The axon is then repeatedly stimulated, and recordings are made of the response. What effects would you expect to observe?

Correct AnswerverifiedInitially, the recording would show norm...View AnswerShow Answer

Figure 12-1 The Neuron Use Figure 12-1 to answer the following questions: -The structure labeled "2" is a(n)

Correct AnswerverifiedShow Answer

The most common neuron of the nervous system is the

Correct AnswerverifiedShow Answer

Which of the following is not a recognized structural classification for neurons?

Correct AnswerverifiedShow Answer

When a second EPSP (excitatory postsynaptic potential) arrives at a single synapse before the effects of the first have disappeared, what occurs?

Correct AnswerverifiedShow Answer

Which of the following is the primary second messenger in G-protein coupled post-synaptic cells?

Correct AnswerverifiedShow Answer

Which of the following is not a function of the neuroglia?

Correct AnswerverifiedShow Answer

The sum of the electrical and chemical forces acting on an ion is known as its

Correct AnswerverifiedShow Answer

Functions of astrocytes include all of the following except

Correct AnswerverifiedShow Answer

Ion channels that are always open are called ________ channels.

Correct AnswerverifiedShow Answer

Which of the following does not influence the time necessary for a nerve impulse to be transmitted?

Correct AnswerverifiedShow Answer

Figure 12-1 The Neuron Use Figure 12-1 to answer the following questions: -What is contained inside the structure labeled "5"?

Correct AnswerverifiedShow Answer

Which of the following is the most important excitatory neurotransmitter in the brain that is importantinlearning and memory?

Correct AnswerverifiedShow Answer

If the permeability of a resting axon to sodium ion increases,

Correct AnswerverifiedShow Answer

________ carry sensory information to the CNS.

Correct AnswerverifiedShow Answer

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Initially, the recording would show norm...
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