Question 1

Which of the following types of nerves is not covered by a protective myelin sheath?

Accepted Answer

A)  long axons
B)  gray matter of the CNS
C)  white matter of the CNS
D)  nerve fibers within the PNS
E)  axons of the CNSF) A) and D)
G) A) and E)

Question 2

List the order of events that will occur during a reflex arc.

Accepted Answer

1.A sensation causes the sensory recepto...

Question 3

The repeated use of which drug leads to the body decreasing the natural production of endorphins?

Accepted Answer

A)  heroin
B)  marijuana
C)  K2
D)  methamphetamine
E)  ecstasyF) A) and D)
G) C) and D)

Question 4

Long term use of heroin results in which set of symptoms?

Accepted Answer

A)  weight gain,poor cognitive performance,irritability
B)  cardiac and/or respiratory arrest,sudden death
C)  apathy,euphoria,hallucinations
D)  addiction,hepatitis,HIV/AIDS,various bacterial infections
E)  anxiety,jitters,insomnia,headachesF) A) and B)
G) A) and C)

Question 5

The spinal cord extends from the base of the brain through a large opening in the skull called the inferior ventricle.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following could happen to the neurotransmitter once it binds to the receiving membrane receptors?

Accepted Answer

A)  reabsorbed by the sending membrane
B)  absorbed by the receiving membrane in order to start the action potential
C)  stays bound to the receiving membrane
D)  released back into the synaptic cleft where it builds up
E)  degrades due to lack of Ca+F) A) and B)
G) A) and C) A

Question 7

Place the following steps in the correct order for a reflex arc.1.Sensory neurons pass signals to interneurons.2.Nerve signals travel along motor fibers to an effector.3.Sensory receptors generate nerve signals.4.Interneurons synapse with motor neurons.5.There is a response to the stimulus.

Accepted Answer

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

Question 8

Which of the following statements is not true concerning acetylcholine's function?

Accepted Answer

A)  Acetylcholine has an excitatory effect on smooth muscle and glands.
B)  Acetylcholine is active in both the CNS and PNS.
C)  In the PNS,acetylcholine excites skeletal muscle.
D)  In the PNS,acetylcholine inhibits cardiac muscle.
E)  The enzyme acetylcholinesterase removes acetylcholine from the receiving cell's membranE.F) A) and D)
G) B) and C)

Question 9

Wernicke's area is associated with

Accepted Answer

A)  reflex centers for controlling heartbeat.
B)  sexual arousal.
C)  the ability to ride a bike.
D)  the sense of smell.
E)  the ability to speak.F) B) and D)
G) A) and C)

Question 10

Which drug is in the same category as nicotine?

Accepted Answer

A)  cocaine
B)  alcohol
C)  heroin
D)  marijuana
E)  none of theseF) A) and C)
G) C) and E)

Question 11

Which of the following statements is not true concerning spinal nerves?

Accepted Answer

A)  The ventral root contains motor fibers exiting the gray matter.
B)  The dorsal root contains sensory fibers entering the gray matter.
C)  Spinal nerves are considered part of the CNS.
D)  The dorsal and ventral roots join before the spinal nerve leaves the vertebral canal.
E)  The spinal nerves project from the cord through intervertebral foramina.F) B) and D)
G) D) and E)

Question 12

The action potential in a neuron is an all-or-nothing event.

Accepted Answer

A) True 
 B)False  True

Question 13

The gap where there is no myelin sheath around a nerve fiber is called a node of Ranvier.

Accepted Answer

A) True 
 B)False

Question 14

The left hemisphere of the brain is more involved in verbal functions than the right hemisphere.

Accepted Answer

A) True 
 B)False

Question 15

Which part of the brain is not functioning correctly if an individual cannot learn new facts and retain them?

Accepted Answer

A)  hippocampus
B)  amygdala
C)  reticular formation
D)  medulla oblongata
E)  none of theseF) B) and C)
G) A) and E)

Question 16

The central nervous system is protected by

Accepted Answer

A)  bone.
B)  muscle.
C)  fibrous cartilage.
D)  hyaline cartilage.
E)  elastic cartilagE.F) A) and E)
G) D) and E)

Question 17

Which of the following statements about cranial nerves is not true?

Accepted Answer

A)  Humans have 31 pairs of cranial nerves.
B)  The cranial nerves are referred to by roman numerals.
C)  Some cranial nerves are only sensory nerves,while some are only motor fibers.Others are mixed.
D)  Cranial nerves are largely associated with the head,neck,and face.
E)  The vagus nerve is a cranial nervE.F) C) and D)
G) D) and E)

Question 18

Depolarization of the neuron occurs when

Accepted Answer

A)  the potassium gates open and potassium moves outside the cell.
B)  the sodium-potassium pump moves sodium inside the cell.
C)  sodium gates open and sodium moves inside the cell.
D)  the sodium-potassium pumps moves potassium inside the cell.
E)  water moves to the outside of the cell and chloride ions follow.F) B) and E)
G) C) and E) C

Question 19

What ensures the one-way direction of an action potential?

Accepted Answer

A)  As soon as the action potential has passed by,that portion of the axon undergoes a short refractory period.
B)  Action potentials are self-propagating.
C)  Conduction of an action potential is an all-or-none event.
D)  An action potential at one node causes an action potential at the next node.
E)  An axon can conduct a volley of action potentials very quickly.F) B) and E)
G) C) and D)

Question 20

Which of the following parts of a neuron is correctly matched?

Accepted Answer

A)  cell body-short extensions that receive impulses
B)  axon-conducts nerve impulses
C)  dendrite-contains the nucleus and other organelles
D)  axon-contains the nucleus and other organelles
E)  dendrite-conducts nerve impulsesF) B) and C)
G) B) and E)

Exam 14: Nervous System

Which of the following types of nerves is not covered by a protective myelin sheath?

Correct AnswerverifiedShow Answer

List the order of events that will occur during a reflex arc.

Correct Answerverified1.A sensation causes the sensory recepto...View AnswerShow Answer

The repeated use of which drug leads to the body decreasing the natural production of endorphins?

Correct AnswerverifiedShow Answer

Long term use of heroin results in which set of symptoms?

Correct AnswerverifiedShow Answer

The spinal cord extends from the base of the brain through a large opening in the skull called the inferior ventricle.

Correct AnswerverifiedShow Answer

Which of the following could happen to the neurotransmitter once it binds to the receiving membrane receptors?

Correct AnswerverifiedA

Place the following steps in the correct order for a reflex arc.1.Sensory neurons pass signals to interneurons.2.Nerve signals travel along motor fibers to an effector.3.Sensory receptors generate nerve signals.4.Interneurons synapse with motor neurons.5.There is a response to the stimulus.

Correct AnswerverifiedShow Answer

Which of the following statements is not true concerning acetylcholine's function?

Correct AnswerverifiedShow Answer

Wernicke's area is associated with

Correct AnswerverifiedShow Answer

Which drug is in the same category as nicotine?

Correct AnswerverifiedShow Answer

Which of the following statements is not true concerning spinal nerves?

Correct AnswerverifiedShow Answer

The action potential in a neuron is an all-or-nothing event.

Correct AnswerverifiedTrue

The gap where there is no myelin sheath around a nerve fiber is called a node of Ranvier.

Correct AnswerverifiedShow Answer

The left hemisphere of the brain is more involved in verbal functions than the right hemisphere.

Correct AnswerverifiedShow Answer

Which part of the brain is not functioning correctly if an individual cannot learn new facts and retain them?

Correct AnswerverifiedShow Answer

The central nervous system is protected by

Correct AnswerverifiedShow Answer

Which of the following statements about cranial nerves is not true?

Correct AnswerverifiedShow Answer

Depolarization of the neuron occurs when

Correct AnswerverifiedC

What ensures the one-way direction of an action potential?

Correct AnswerverifiedShow Answer

Which of the following parts of a neuron is correctly matched?

Correct AnswerverifiedShow Answer

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1.A sensation causes the sensory recepto...
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A

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True

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C

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