Question 1

When the measured potential of a membrane reaches threshold,

Accepted Answer

A)   potassium rapidly enters the cell.
B)   potassium rapidly leaves the cell.
C)   sodium rapidly enters the cell.
D)   sodium rapidly leaves the cell.E) A) and D)
F) C) and D)

Question 2

Faster impulse conduction speeds are possible with _______ axons.

Accepted Answer

A)   thin diameter
B)   thick diameterC) A) and B)
D) undefined

Question 3

This condition is caused by unequal distribution of positive and negative charges across the plasma membrane of a neuron.

Accepted Answer

A)   neutralization
B)   neurulation
C)   polarization
D)   potentiationE) B) and C)
F) A) and C)

Question 4

Sensory and motor function,memory,reasoning and other higher cognitive functions are performed by this part of the brain.

Accepted Answer

A)   diencephalon
B)   cerebellum
C)   cerebrum
D)   brain stemE) A) and B)
F) A) and C)

Question 5

The reticular formation

Accepted Answer

A)   stimulates cortical wakefulness.
B)   inhibits involuntary muscle movement.
C)   stimulates protein synthesis by the rough endoplasmic reticulum.
D)   stimulates voluntary muscle movement.E) B) and C)
F) B) and D)

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

In the patellar reflex the afferent and efferent pathways are part of the femoral nerve,so the femoral nerve is

Accepted Answer

A)   a sensory nerve.
B)   a motor nerve.
C)   a mixed nerve.D) A) and B)
E) All of the above

Question 8

When ten or more neurons conduct impulses to five or fewer same post-synaptic neurons,the conduction pattern is said to be

Accepted Answer

A)   convergent.
B)   divergent.C) A) and B)
D) undefined

Question 9

A nerve is a single neuron.

Accepted Answer

A) True 
 B)False

Question 10

Effectors that are capable of bringing about change in the internal environment include muscles and __________.

Accepted Answer

The answer of Effectors that are capable of bringing about...

Question 11

This motor 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 branchF) A) and B)
G) C) and E)

Question 12

If fibers in an ascending tract of the spinal cord are cut,the affected person will have a loss of motor functions below the injury.

Accepted Answer

A) True 
 B)False

Question 13

In most neurons,the threshold potential is about

Accepted Answer

A)   - 55 mV.
B)   - 100 mV.
C)   + 25 mV.
D)   + 30 mV.E) C) and D)
F) A) and B)

Question 14

Sensory nerves carry information to effectors.

Accepted Answer

A) True 
 B)False

Question 15

Astrocytes provide structural support in the nervous system.

Accepted Answer

A) True 
 B)False

Question 16

Basal nuclei produce dopamine and function with other brain areas to

Accepted Answer

A)   facilitate voluntary movement.
B)   inhibit sensory awareness.
C)   stimulate pattern recognition.
D)   interpret speech and other auditory input.E) A) and B)
F) A) and D)

Question 17

Dorsal roots of spinal nerves are

Accepted Answer

A)   sensory only.
B)   motor only.
C)   both sensory and motor.
D)   motor nerves.E) All of the above
F) A) and B)

Question 18

Which describes the ion concentrations inside and outside of a neuron?

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 concentration is higher on the inside of the cell and potassium ion concentration is higher on the outside of the cell.
D)   The sodium ion concentration is higher on the outside of the cell and potassium ion concentration is higher on the inside of the cell.
E)   The concentrations of sodium and potassium ions are both equal inside and outside of the cell.F) A) and D)
G) All of the above

Question 19

A _____________ is defined as a rapid automatic response to a stimulus.

Accepted Answer

A)   reaction
B)   prediction
C)   reflex
D)   symptomE) B) and D)
F) C) and D)

Question 20

These neuroglia form an epithelial-like membrane that lines the enclosed spaces of the brain and spinal cord.

Accepted Answer

A)   astrocytes
B)   ependymal cells
C)   oligodendrocytes
D)   microglia
E)   Schwann cellsF) None of the above
G) C) and D)

Exam 9: Nervous System

Sensory and motor function,memory,reasoning and other higher cognitive functions are performed by this part of the brain.

Correct AnswerverifiedShow Answer

In most neurons,the threshold potential is about

Correct AnswerverifiedShow Answer

Effectors that are capable of bringing about change in the internal environment include muscles and __________.

Correct AnswerverifiedShow Answer

This condition is caused by unequal distribution of positive and negative charges across the plasma membrane of a neuron.

Correct AnswerverifiedShow Answer

Basal nuclei produce dopamine and function with other brain areas to

Correct AnswerverifiedShow Answer

Sensory nerves carry information to effectors.

Correct AnswerverifiedShow Answer

Dorsal roots of spinal nerves are

Correct AnswerverifiedShow Answer

Faster impulse conduction speeds are possible with _______ axons.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A nerve is a single neuron.

Correct AnswerverifiedShow Answer

When the measured potential of a membrane reaches threshold,

Correct AnswerverifiedShow Answer

A _____________ is defined as a rapid automatic response to a stimulus.

Correct AnswerverifiedShow Answer

When ten or more neurons conduct impulses to five or fewer same post-synaptic neurons,the conduction pattern is said to be

Correct AnswerverifiedShow Answer

If fibers in an ascending tract of the spinal cord are cut,the affected person will have a loss of motor functions below the injury.

Correct AnswerverifiedShow Answer

These neuroglia form an epithelial-like membrane that lines the enclosed spaces of the brain and spinal cord.

Correct AnswerverifiedShow Answer

Astrocytes provide structural support in the nervous system.

Correct AnswerverifiedShow Answer

Which describes the ion concentrations inside and outside of a neuron?

Correct AnswerverifiedShow Answer

In the patellar reflex the afferent and efferent pathways are part of the femoral nerve,so the femoral nerve is

Correct AnswerverifiedShow Answer

The reticular formation

Correct AnswerverifiedShow Answer

This motor branch of the peripheral nervous system controls skeletal muscle.

Correct AnswerverifiedShow Answer

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