Question 1

In the cochlea,how is sound transmitted into nerve signals that reach the brain?

Accepted Answer

A)  through photoreceptors
B)  through thermoreceptors
C)  through pain receptors
D)  through mechanoreceptors
E)  through chemoreceptorsF) C) and E)
G) A) and D) D

Question 2

The junctions between one neuron and another neuron are called

Accepted Answer

A)  axons.
B)  dendrites.
C)  synapses.
D)  cell bodies.
E)  myelin sheaths.F) B) and E)
G) All of the above

Question 3

A nerve impulse travels about __________ times faster when it leaps between gaps in the myelin sheath than when it travels along an unmyelinated axon.

Accepted Answer

A)  5
B)  10
C)  20
D)  100
E)  50F) C) and E)
G) A) and B)

Question 4

The myelin sheath around an axon is continuous.

Accepted Answer

A) True 
 B)False

Question 5

In humans,taste buds are most highly concentrated on the inside surface of the lips of the mouth.

Accepted Answer

A) True 
 B)False

Question 6

Which is detected with the general senses?

Accepted Answer

A)  kissing someone you care for
B)  shaking hands with an acquaintance
C)  someone pinching your cheeks
D)  All answers are correct.
E)  your finger on a hot stoveF) B) and C)
G) A) and B)

Question 7

Which of the following is not one of the special senses?

Accepted Answer

A)  smell
B)  vision
C)  taste
D)  touch
E)  hearingF) B) and C)
G) D) and E) D

Question 8

Odorous molecules are first detected in the nose,are transduced,and travel to the olfactory bulb and then to the cerebral cortex.

Accepted Answer

A) True 
 B)False

Question 9

if you wanted to disrupt transmission of nervous signals,you could use a drug to destroy interneurons.

Accepted Answer

A) True 
 B)False

Question 10

When a snake flicks its tongue the tips of the forked tongue pass through openings in the palate and contact sensory cells in the snout.How would this help a snake detect its prey?

Accepted Answer

A)  The snout touches the prey,stimulating mechanoreceptors that let the snake identify the prey.
B)  The snake can taste its prey when it bites it to tell if it is edible.
C)  The motion of the tongue moves air over the snake's snout,helping it to smell.
D)  The tongue touches the prey,stimulating mechanoreceptors that let the snake identify the prey.
E)  Odor molecules from the prey are brought to the snake's receptors.F) A) and E)
G) A) and B)

Question 11

An action potential is generated when free nerve endings detect

Accepted Answer

A)  warm bath water.
B)  a cold pool.
C)  a kiss.
D)  All answers are correct.
E)  a tap on the shoulder.F) B) and D)
G) A) and B)

Question 12

Neurotransmitters released from a "sending" cell must travel across a tiny space called a synaptic cleft.

Accepted Answer

A) True 
 B)False  True

Question 13

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

Accepted Answer

A)  peripheral nervous system.
B)  central nervous system.
C)  somatic nervous system.
D)  autonomic nervous system.
E)  sympathetic nervous system.F) C) and D)
G) B) and E)

Question 14

The ______ receives the signal that your finger is too hot and sends the message to move the finger away from the stove.The ______ transfers the message to the finger.

Accepted Answer

A)  spinal cord;spinal cord
B)  central nervous system;peripheral nervous system
C)  peripheral nervous system;spinal cord
D)  peripheral nervous system;brain
E)  brain;central nervous systemF) D) and E)
G) All of the above

Question 15

If you were working with a patient with brain damage who had serious problems with homeostasis,you would suspect that the brain damage included the

Accepted Answer

A)  cerebellum.
B)  hypothalamus.
C)  medulla oblongata.
D)  pons.
E)  cerebrum.F) All of the above
G) B) and E)

Question 16

An action potential will occur only if

Accepted Answer

A)  sodium ions are released into the interior of the axon.
B)  the interior of the axon becomes less negative than the resting potential.
C)  the threshold potential is reached.
D)  a stimulus triggers a neuron to fire.
E)  All answers are correct.F) C) and D)
G) A) and B)

Question 17

If you wanted to study the part of a neuron that carries electrical signals away from the cell body,you would look for what part?

Accepted Answer

A)  dendrite
B)  axon
C)  myelin sheath
D)  cell body
E)  hemisphereF) B) and E)
G) All of the above

Question 18

An atom or molecule with an electrical charge is

Accepted Answer

A)  an isomer.
B)  an isotope.
C)  an ion.
D)  a neurotransmitter.
E)  an acid.F) C) and D)
G) B) and C)

Question 19

In myelinated axons

Accepted Answer

A)  potassium ions can diffuse into the axon only at gaps in the myelin.
B)  sodium ions can diffuse into the axon only at gaps in the myelin.
C)  sodium ions can diffuse out of the axon only at gaps in the myelin.
D)  All answers are correct.E) A) and D)
F) B) and D)

Question 20

In humans,which type of receptor is used primarily to detect light?

Accepted Answer

A)  photoreceptor
B)  pain receptor
C)  chemoreceptor
D)  mechanoreceptor
E)  thermoreceptorF) D) and E)
G) All of the above

Exam 24: The Nervous System and the Senses

In the cochlea,how is sound transmitted into nerve signals that reach the brain?

Correct AnswerverifiedD

The junctions between one neuron and another neuron are called

Correct AnswerverifiedShow Answer

A nerve impulse travels about __________ times faster when it leaps between gaps in the myelin sheath than when it travels along an unmyelinated axon.

Correct AnswerverifiedShow Answer

The myelin sheath around an axon is continuous.

Correct AnswerverifiedShow Answer

In humans,taste buds are most highly concentrated on the inside surface of the lips of the mouth.

Correct AnswerverifiedShow Answer

Which is detected with the general senses?

Correct AnswerverifiedShow Answer

Which of the following is not one of the special senses?

Correct AnswerverifiedD

Odorous molecules are first detected in the nose,are transduced,and travel to the olfactory bulb and then to the cerebral cortex.

Correct AnswerverifiedShow Answer

if you wanted to disrupt transmission of nervous signals,you could use a drug to destroy interneurons.

Correct AnswerverifiedShow Answer

When a snake flicks its tongue the tips of the forked tongue pass through openings in the palate and contact sensory cells in the snout.How would this help a snake detect its prey?

Correct AnswerverifiedShow Answer

An action potential is generated when free nerve endings detect

Correct AnswerverifiedShow Answer

Neurotransmitters released from a "sending" cell must travel across a tiny space called a synaptic cleft.

Correct AnswerverifiedTrue

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

Correct AnswerverifiedShow Answer

The ______ receives the signal that your finger is too hot and sends the message to move the finger away from the stove.The ______ transfers the message to the finger.

Correct AnswerverifiedShow Answer

If you were working with a patient with brain damage who had serious problems with homeostasis,you would suspect that the brain damage included the

Correct AnswerverifiedShow Answer

An action potential will occur only if

Correct AnswerverifiedShow Answer

If you wanted to study the part of a neuron that carries electrical signals away from the cell body,you would look for what part?

Correct AnswerverifiedShow Answer

An atom or molecule with an electrical charge is

Correct AnswerverifiedShow Answer

In myelinated axons

Correct AnswerverifiedShow Answer

In humans,which type of receptor is used primarily to detect light?

Correct AnswerverifiedShow Answer

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D

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D

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True

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The receives the signal that your finger is too hot and sends the message to move the finger away from the stove.The transfers the message to the finger.

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