Question 1

What is the relative distrubution of sodium and potassium ions across a neuronal membrane?

Accepted Answer

A)   Sodium and potassium ions are both at higher concentration on the inside of the cell.
B)   Sodium and potassium ions are both at higher concentration on the outside of the cell.
C)   The sodium ion concentrationis higher on the inside of the cell and potassium ion concentration ishigher on the outside of the cell.
D)   The sodium ion concentrationis higher on the outside of the cell and potassium ion concentration ishigher on the inside of the cell.
E)   The concentrations of sodium and potassium ions are both equal inside and outside of the cell.

Question 2

What happens when the plasma membrane of a neuron becomes more permeable to potassium?

Accepted Answer

A)   Potassium leaves the cell.
B)   Potassium enters the cell.
C)   Sodium enters the cell.
D)   Sodium leaves the cell.

Question 3

Which is not a method for clearing neurotransmitters from the synaptic cleft?

Accepted Answer

A)   Decomposition by enzymes
B)   Reuptake by the releasing neuron
C)   Diffusion away from the synapse
D)   Phagocytosis by ependymal cells

Question 4

What structure is a part of the diencephalon?

Accepted Answer

A)   Thalamus
B)   Cerebral aqueduct
C)   Cerebral peduncles
D)   Frontal lobe
E)   Pons

Question 5

What part of the brain contains the thalamus andhypothalamus, and processes sensory information?

Accepted Answer

A)   Diencephalon
B)   Cerebellum
C)   Cerebrum
D)   Brain stem

Question 6

Why are an infant's responses to stimuli coarse and undifferentiated?

Accepted Answer

A)   Nerve fibers have not yet developed.
B)   Nerve fibers are not yet capable of action potentials.
C)   Nerve fibers have not yet developed connections to the brain.
D)   Nerve fibers are not completely myelinated.
E)   Nerve fibers cannot release neurotransmitter.

Question 7

What type of conduction occurs when an impulse jumps from node to node along a myelinated axon?

Accepted Answer

A)   Saltatory conduction
B)   Salutatory conduction
C)   Transitory conduction
D)   Continuous conduction

Question 8

The gray commissure of the spinal cord surrounds the central canal.

Accepted Answer

A) True 
 B)False

Question 9

Nodes of Ranvier connect adjacent neurons.

Accepted Answer

A) True 
 B)False

Question 10

If a neuron's membrane potential measures +25mV, the neuron is __________.

Accepted Answer

A)   polarized
B)   hyperpolarized
C)   depolarized
D)   repolarized

Question 11

Cranial nerves connect the brain only to head and neck regions; spinal nerves connect to all regions below the neck.

Accepted Answer

A) True 
 B)False

Question 12

Normal, quiet, everyday activities like resting and digesting are controlled by which division of the autonomic nervous system?

Accepted Answer

A)   Somatic branch
B)   Sympathetic branch
C)   Parasympathetic branch
D)   Adrenergic branch C

Question 13

Botulism toxin prevents release of acetylcholine. Which of the following might result if a person had botulism toxin poisoning?

Accepted Answer

A)   Inability to move
B)   Constant tonic state of mucle contraction
C)   Inability to feel objects in the hand
D)   Inability to think

Question 14

The arbor vitae is part ofthe cerebrum.

Accepted Answer

A) True 
 B)False

Question 15

Which glial cells produce the myelin sheath on neurons of the peripheral nervous system?

Accepted Answer

A)   Astrocytes
B)   Ependymalcells
C)   Oligodendrocytes
D)   Microglia
E)   Schwann cells

Question 16

Given the following five parts, place them in order of a reflex arc: (1)  central nervous system, (2)  effector, (3)  motor neuron, (4)  receptor, (5)  sensory neuron.

Accepted Answer

A)   4, 5, 1, 3, 2
B)   4, 5, 3, 2, 1
C)   3, 1, 4, 5, 2
D)   2, 3, 4, 1, 5 A

Question 17

What branch of the peripheral nervous system controls skeletal muscle?

Accepted Answer

A)   Visceral branch
B)   Autonomic branch
C)   Somatic branch
D)   Sensory branch
E)   Receptor branch

Question 18

Due to damage of a nervous structure during birth, a patient's arm is adducted, internally rotated, and his hand faces posteriorly, a condition known as Erb's Duchenne palsy. What nervous structure was damaged?

Accepted Answer

A)   Cervical plexus
B)   Femoral nerve
C)   Brachial plexus
D)   Lumboscaral plexus
E)   Sciatic nerve C

Question 19

The respiratory areas are in the pons and in the __________.

Accepted Answer

A)   thalamus
B)   cerebrum
C)   midbrain
D)   medulla oblongata
E)   cerebellum

Question 20

A physician shines a light into the right eye and the right pupil constricts in response. Which of the following cranial nerves is being tested in this scenario?

Accepted Answer

A)   Optic nerve (CN II) 
B)   Abducens nerve (CN VI) 
C)   Facial nerve (CN VII) 
D)   Vagus nerve (CN X)

Exam 9: Nervous System

What is the relative distrubution of sodium and potassium ions across a neuronal membrane?

Correct AnswerverifiedShow Answer

What happens when the plasma membrane of a neuron becomes more permeable to potassium?

Correct AnswerverifiedShow Answer

Which is not a method for clearing neurotransmitters from the synaptic cleft?

Correct AnswerverifiedShow Answer

What structure is a part of the diencephalon?

Correct AnswerverifiedShow Answer

What part of the brain contains the thalamus andhypothalamus, and processes sensory information?

Correct AnswerverifiedShow Answer

Why are an infant's responses to stimuli coarse and undifferentiated?

Correct AnswerverifiedShow Answer

What type of conduction occurs when an impulse jumps from node to node along a myelinated axon?

Correct AnswerverifiedShow Answer

The gray commissure of the spinal cord surrounds the central canal.

Correct AnswerverifiedShow Answer

Nodes of Ranvier connect adjacent neurons.

Correct AnswerverifiedShow Answer

If a neuron's membrane potential measures +25mV, the neuron is __________.

Correct AnswerverifiedShow Answer

Cranial nerves connect the brain only to head and neck regions; spinal nerves connect to all regions below the neck.

Correct AnswerverifiedShow Answer

Normal, quiet, everyday activities like resting and digesting are controlled by which division of the autonomic nervous system?

Correct AnswerverifiedC

Botulism toxin prevents release of acetylcholine. Which of the following might result if a person had botulism toxin poisoning?

Correct AnswerverifiedShow Answer

The arbor vitae is part ofthe cerebrum.

Correct AnswerverifiedShow Answer

Which glial cells produce the myelin sheath on neurons of the peripheral nervous system?

Correct AnswerverifiedShow Answer

Given the following five parts, place them in order of a reflex arc: (1) central nervous system, (2) effector, (3) motor neuron, (4) receptor, (5) sensory neuron.

Correct AnswerverifiedA

What branch of the peripheral nervous system controls skeletal muscle?

Correct AnswerverifiedShow Answer

Due to damage of a nervous structure during birth, a patient's arm is adducted, internally rotated, and his hand faces posteriorly, a condition known as Erb's Duchenne palsy. What nervous structure was damaged?

Correct AnswerverifiedC

The respiratory areas are in the pons and in the __________.

Correct AnswerverifiedShow Answer

A physician shines a light into the right eye and the right pupil constricts in response. Which of the following cranial nerves is being tested in this scenario?

Correct AnswerverifiedShow Answer

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