Question 1

In the section "Investigating Life: The Nerve of Those Clams!",which of the following was the dependent variable?

Accepted Answer

A)  the concentration of toxin fed to the clams
B)  the rate of Na+ flow across the membrane of the clam neuron
C)  the ability of clams to burrow
D)  the location from which the clams were isolated
E)  the species of algae fed to the clams

Question 2

Usually the ________________ conducts nerve impulses from the cell body to a muscle,gland,or another neuron.

Accepted Answer

A)  dendrite
B)  axon
C)  myelin sheath
D)  cell body
E)  hemisphere

Question 3

An action potential is NOT generated by pain mechanoreceptors of the general senses when

Accepted Answer

A)  you taste a sour lemon.
B)  a paper cut occurs on your finger.
C)  a bee stings you.
D)  you remove frozen foods from the freezer.
E)  you put on a shirt.

Question 4

A typical neuron consists of a cell body,dendrites,and an axon.

Accepted Answer

A) True 
 B)False

Question 5

The part of the eye that detects color is the

Accepted Answer

A)  cone cells.
B)  rod cells.
C)  cornea.
D)  retina.
E)  optic nervE.

Question 6

In humans,which of the following is used primarily to detect heat?

Accepted Answer

A)  photoreceptor
B)  pain receptor
C)  thermoreceptor
D)  mechanoreceptor
E)  chemoreceptor

Question 7

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.

Question 8

The size of the opening for light coming into the eye is regulated by

Accepted Answer

A)  corneA.
B)  pupil.
C)  iris.
D)  cone.
E)  lens.

Question 9

Unmyelinated regions between adjacent myelin sheath cells are called synaptic clefts.

Accepted Answer

A) True 
 B)False

Question 10

Toxins released by black widow spider venom cause an explosive release of acetylcholine from neurons.These toxins cause paralysis by

Accepted Answer

A)  inhibiting synthesis of acetylcholine.
B)  triggering increased endocytosis of vesicles containing acetylcholine.
C)  triggering increased synthesis of acetylcholine.
D)  inhibiting exocytosis of vesicles containing acetylcholine.
E)  blocking diffusion of acetylcholine out through channel proteins.

Question 11

If a person with a brain tumor develops impaired vision,which region of the brain was likely to be affected?

Accepted Answer

A)  frontal lobe
B)  parietal lobe
C)  temporal lobe
D)  occipital lobe
E)  brainstem

Question 12

The reason that we can tell light from sound is because different neurons transmit these different stimuli.

Accepted Answer

A) True 
 B)False

Question 13

In a disorder called macular degeneration,photoreceptors in the retina die.How would macular degeneration impair vision?

Accepted Answer

A)  A patient could not see things clearly that are directly in front of them.
B)  A patient could not see things with peripheral vision.
C)  A patient would become blind.
D)  A patient would not be able to see in color.
E)  A patient would not be able to see at night.

Question 14

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.

Question 15

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

Accepted Answer

A)  smell
B)  vision
C)  taste
D)  touch
E)  hearing

Question 16

In the section "Investigating Life: The Nerve of Those Clams!",which of the following support the hypothesis that Na+ transport is affected by saxitoxin?

Accepted Answer

A)  Human cells are resistant to saxitoxin while clam cells are sensitive to saxitoxin.
B)  Clam cells altered with the mutated form of the Na+ transporter were more resistant to saxitoxin.
C)  Removing Na+ from the clams makes them resistant to saxitoxin.
D)  Human cells are sensitive to saxitoxin while clam cells are resistant to saxitoxin.
E)  Na+ ion concentration did not affect uptake of saxitoxin by clam cells.

Question 17

The nervous system controls

Accepted Answer

A)  All answers are correct.
B)  conscious decisions,like what shirt to wear.
C)  subconscious reactions,like burping.
D)  emotional reactions,like crying.
E)  sensual actions,like hearing a loud sound.

Question 18

What is transported from a neuron,through the synaptic cleft,and received by the receptors of another cell (shown in blue in the figure) ?

Accepted Answer

A)  sodium ions
B)  potassium ions
C)  neurotransmitters
D)  oxygen molecules
E)  neuroglia

Question 19

In humans,which of the following type of receptor is primarily used to detect airborne or dissolved molecules?

Accepted Answer

A)  photoreceptor
B)  chemoreceptor
C)  thermoreceptor
D)  pain receptor
E)  mechanoreceptor

Question 20

The rounded part of a neuron containing the nucleus and mitochondria is the

Accepted Answer

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

Exam 24: Nervous System and the Senses

Usually the ________________ conducts nerve impulses from the cell body to a muscle,gland,or another neuron.

Correct AnswerverifiedShow Answer

Toxins released by black widow spider venom cause an explosive release of acetylcholine from neurons.These toxins cause paralysis by

Correct AnswerverifiedShow Answer

The nervous system controls

Correct AnswerverifiedShow Answer

In myelinated axons

Correct AnswerverifiedShow Answer

An action potential will occur only if

Correct AnswerverifiedShow Answer

An action potential is NOT generated by pain mechanoreceptors of the general senses when

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The part of the eye that detects color is the

Correct AnswerverifiedShow Answer

In humans,which of the following is used primarily to detect heat?

Correct AnswerverifiedShow Answer

What is transported from a neuron,through the synaptic cleft,and received by the receptors of another cell (shown in blue in the figure) ?

Correct AnswerverifiedShow Answer

The rounded part of a neuron containing the nucleus and mitochondria is the

Correct AnswerverifiedShow Answer

In humans,which of the following type of receptor is primarily used to detect airborne or dissolved molecules?

Correct AnswerverifiedShow Answer

In the section "Investigating Life: The Nerve of Those Clams!",which of the following was the dependent variable?

Correct AnswerverifiedShow Answer

Unmyelinated regions between adjacent myelin sheath cells are called synaptic clefts.

Correct AnswerverifiedShow Answer

In the section "Investigating Life: The Nerve of Those Clams!",which of the following support the hypothesis that Na+ transport is affected by saxitoxin?

Correct AnswerverifiedShow Answer

The size of the opening for light coming into the eye is regulated by

Correct AnswerverifiedShow Answer

If a person with a brain tumor develops impaired vision,which region of the brain was likely to be affected?

Correct AnswerverifiedShow Answer

The reason that we can tell light from sound is because different neurons transmit these different stimuli.

Correct AnswerverifiedShow Answer

In a disorder called macular degeneration,photoreceptors in the retina die.How would macular degeneration impair vision?

Correct AnswerverifiedShow Answer

A typical neuron consists of a cell body,dendrites,and an axon.

Correct AnswerverifiedShow Answer

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In the section "Investigating Life: The Nerve of Those Clams!",which of the following support the hypothesis that Na⁺ transport is affected by saxitoxin?

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