Question 1

The layer of the wall of the eye that contains blood vessels that supply nutrients to the sheet of photoreceptors at the back of the eye and becomes the iris at the front of the eye is the

Accepted Answer

A)   sclera.
B)   retina.
C)   vitreous humor.
D)   aqueous humor.
E)   choroid.F) None of the above
G) B) and D)

Question 2

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) None of the above
G) A) and E)

Question 3

The opening for light to enter into the eye is the

Accepted Answer

A)   cornea.
B)   retina.
C)   pupil.
D)   iris.
E)   lens.F) B) and C)
G) All of the above

Question 4

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) A) and B)
G) A) and D)

Question 5

Tetrodotoxin is a heat-stable molecule produced by puffer fish that blocks the entry of sodium ions into neurons. About 10-45 minutes after ingestion of tetrodotoxin, tingling of the tongue and inner surface of the mouth begins. An ascending paralysis develops, and death can occur within 6-24 hours, after respiratory muscle paralysis.
-Why would this lead to paralysis and death?

Accepted Answer

A)   Neurons run out of energy.
B)   Neurons swell because of increased osmosis.
C)   Neurons can't recharge.
D)   Neurons can't fire without a voltage change.
E)   Neurons cannot release neurotransmitters.F) B) and C)
G) A) and D)

Question 6

The three types of neurons in the nervous system of humans are

Accepted Answer

A)   interneurons, synaptic neurons, and neuroglia.
B)   synaptic neurons, motor neurons, and neuroglia.
C)   sensory neurons, interneurons, and motor neurons.
D)   interneurons, sensory neurons, and neuroglia.
E)   synaptic neurons, motor neurons, and sensory neurons.F) A) and B)
G) C) and D)

Question 7

The part of the neuron that is usually a single long extension that conducts an impulse to a muscle or another neuron is the

Accepted Answer

A)   synapse.
B)   cell body.
C)   axon.
D)   dendrite.
E)   myelin sheath.F) B) and D)
G) A) and B)

Question 8

The condition that develops when GABA levels in the brain are deficient is

Accepted Answer

A)   epilepsy.
B)   insomnia.
C)   Huntington disease.
D)   Alzheimer disease.
E)   Parkinson disease.F) A) and E)
G) A) and D)

Question 9

If you wanted to disrupt transmission of nervous signals from the brain to skeletal muscles,you could use a drug to destroy interneurons.

Accepted Answer

A) True 
 B)False

Question 10

The condition that develops when dopamine levels in the brain are deficient is

Accepted Answer

A)   epilepsy.
B)   insomnia.
C)   Alzheimer disease.
D)   Huntington disease.
E)   Parkinson disease.F) B) and E)
G) D) and E)

Question 11

A mutant fruit fly with poor nerve transmission proves to have poor reception of signals sent by one neuron to another.This is probably due to mutated dendrite formation.

Accepted Answer

A) True 
 B)False

Question 12

If a neuron is at rest,the concentration of potassium ions is greatest outside the cell and the concentration of sodium ions is greatest inside the cell.

Accepted Answer

A) True 
 B)False

Question 13

-The diagram shows a

Accepted Answer

A)   neuron cell body.
B)   synapse.
C)   neuroglial cell.
D)   myelin sheath.
E)   meninge.F) D) and E)
G) A) and C)

Question 14

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) B) and C)
G) B) and E)

Question 15

A motor neuron's ________ and ________ reside in the central nervous system,but its ________ extend(s) into the peripheral nervous system.

Accepted Answer

A)   cell body; dendrites; axon
B)   dendrites; cell body; axon 
C)   dendrites; axon; cell body
D)   axon; cell body; dendrites
E)   None of the answers are correct.F) A) and D)
G) B) and E)

Question 16

At the snail-shaped ________ of the inner ear,sound is transduced into nerve impulses.

Accepted Answer

A)   auditory canal
B)   eardrum
C)   auditory nerve
D)   cochlea
E)   oval windowF) A) and B)
G) A) and C)

Question 17

The type of neuron that brings information toward the central nervous system is the

Accepted Answer

A)   synaptic neuron.
B)   interneuron.
C)   motor neuron.
D)   sensory neuron.
E)   neuroglia.F) A) and B)
G) A) and E)

Question 18

Working with a patient with eye problems,you discover that the patient cannot focus images.You suspect that there may be a defect in the

Accepted Answer

A)   lens.
B)   cone.
C)   pupil.
D)   retina.
E)   iris.F) A) and E)
G) D) and E)

Question 19

You are lying on a sand dune looking over the water, listening to the waves, and enjoying the feel of the sun and wind on your skin. You also smell the salty ocean air and seaweed that has washed ashore.
-When you feel the sun on your skin,what is being activated?

Accepted Answer

A)   mechanoreceptor
B)   photoreceptor
C)   pain receptor
D)   thermoreceptor
E)   chemoreceptorF) A) and B)
G) B) and E)

Question 20

An atom or molecule with an electrical charge is a(n)

Accepted Answer

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

Exam 24: The Nervous System and the Senses

If you wanted to disrupt transmission of nervous signals from the brain to skeletal muscles,you could use a drug to destroy interneurons.

Correct Answer
verified

At the snail-shaped ________ of the inner ear,sound is transduced into nerve impulses.

Correct Answer
verified

An atom or molecule with an electrical charge is a(n)

Correct Answer
verified

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 Answer
verified

The condition that develops when GABA levels in the brain are deficient is

Correct Answer
verified

The layer of the wall of the eye that contains blood vessels that supply nutrients to the sheet of photoreceptors at the back of the eye and becomes the iris at the front of the eye is the

Correct Answer
verified

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 Answer
verified

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

Correct Answer
verified

If a neuron is at rest,the concentration of potassium ions is greatest outside the cell and the concentration of sodium ions is greatest inside the cell.

Correct Answer
verified

The condition that develops when dopamine levels in the brain are deficient is

Correct Answer
verified

You are lying on a sand dune looking over the water, listening to the waves, and enjoying the feel of the sun and wind on your skin. You also smell the salty ocean air and seaweed that has washed ashore. -When you feel the sun on your skin,what is being activated?

Correct Answer
verified

The part of the neuron that is usually a single long extension that conducts an impulse to a muscle or another neuron is the

Correct Answer
verified

A mutant fruit fly with poor nerve transmission proves to have poor reception of signals sent by one neuron to another.This is probably due to mutated dendrite formation.

Correct Answer
verified

A motor neuron's and reside in the central nervous system,but its extend(s) into the peripheral nervous system.

Correct Answer
verified

Working with a patient with eye problems,you discover that the patient cannot focus images.You suspect that there may be a defect in the

Correct Answer
verified

The type of neuron that brings information toward the central nervous system is the

Correct Answer
verified

The opening for light to enter into the eye is the

Correct Answer
verified

-The diagram shows a

Correct Answer
verified

Correct Answer
verified

The three types of neurons in the nervous system of humans are

Correct Answer
verified

Exam 24: The Nervous System and the Senses

If you wanted to disrupt transmission of nervous signals from the brain to skeletal muscles,you could use a drug to destroy interneurons.

Correct AnswerverifiedShow Answer

At the snail-shaped ________ of the inner ear,sound is transduced into nerve impulses.

Correct AnswerverifiedShow Answer

An atom or molecule with an electrical charge is a(n)

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 condition that develops when GABA levels in the brain are deficient is

Correct AnswerverifiedShow Answer

The layer of the wall of the eye that contains blood vessels that supply nutrients to the sheet of photoreceptors at the back of the eye and becomes the iris at the front of the eye is the

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

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

Correct AnswerverifiedShow Answer

If a neuron is at rest,the concentration of potassium ions is greatest outside the cell and the concentration of sodium ions is greatest inside the cell.

Correct AnswerverifiedShow Answer

The condition that develops when dopamine levels in the brain are deficient is

Correct AnswerverifiedShow Answer

You are lying on a sand dune looking over the water, listening to the waves, and enjoying the feel of the sun and wind on your skin. You also smell the salty ocean air and seaweed that has washed ashore. -When you feel the sun on your skin,what is being activated?

Correct AnswerverifiedShow Answer

The part of the neuron that is usually a single long extension that conducts an impulse to a muscle or another neuron is the

Correct AnswerverifiedShow Answer

A mutant fruit fly with poor nerve transmission proves to have poor reception of signals sent by one neuron to another.This is probably due to mutated dendrite formation.

Correct AnswerverifiedShow Answer

A motor neuron's ________ and ________ reside in the central nervous system,but its ________ extend(s) into the peripheral nervous system.

Correct AnswerverifiedShow Answer

Working with a patient with eye problems,you discover that the patient cannot focus images.You suspect that there may be a defect in the

Correct AnswerverifiedShow Answer

The type of neuron that brings information toward the central nervous system is the

Correct AnswerverifiedShow Answer

The opening for light to enter into the eye is the

Correct AnswerverifiedShow Answer

-The diagram shows a

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The three types of neurons in the nervous system of humans are

Correct AnswerverifiedShow Answer

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verified

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Correct Answer
verified

Correct Answer
verified

Correct Answer
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verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A motor neuron's and reside in the central nervous system,but its extend(s) into the peripheral nervous system.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
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