Focus on Nursing Pharmacology nurs 317

Question 1

The cerebellum
a.initiates voluntary muscle movement.
b.helps regulate the tone of skeletal muscles.
c.if destroyed, would result in the loss of all voluntary skeletal activity.
d.contains the centers responsible for the regulation of body temperature.

Answer 1

a

Question 2

At those regions of the nerve membrane where myelin is present, there is
a.low resistance to electrical current.
b.high resistance to electrical current.
c.high conductance of electrical current.
d.energy loss for the cell.

Answer 2

a

Question 3

The nerve synapse
a.is not resistant to electrical current.
b.cannot become exhausted.
c.has a synaptic cleft.
d.transfers information at the speed of electricity.

Answer 3

a

Question 4

Which could result in the initiation of an action potential?
a.Depolarizing the membrane
b.Decreasing the extracellular potassium concentration
c.Increasing the activity of the sodium–potassium active transport system
d.Stimulating the nerve with a threshold electrical stimulus during the absolute refractory period of the membrane

Answer 4

c

Question 5

Neurotransmitters are
a.produced in the muscle to communicate with nerves.
b.the chemicals used to stimulate or suppress effectors at the nerve synapse.
c.usually found in the diet.
d.nonspecific in their action on various nerves.

Answer 5

c

Question 6

The limbic system is an area of the brain that
a.is responsible for coordination of movement.
b.is responsible for the special senses.
c.is responsible for the expression of emotions.
d.controls sleep.

Answer 6

d

Question 7

The most primitive area of the brain, the brainstem, contains areas responsible for
a.vomiting, swallowing, respiration, arousal, and sleep.
b.learning.
c.motivation and memory.
d.taste, sight, hearing, and balance.

Answer 7

a

Question 8

A clinical indication of poor blood supply to the brain, particularly to the higher levels where learning takes place, would be
a.loss of long-term memory.
b.loss of short-term memory.
c.loss of coordinated movement.
d.insomnia.

Answer 8

c

Question 9

In explaining the importance of a constant blood supply to the brain, the nurse would tell the student which?
a.Energy is needed to maintain nerve membranes and cannot be produced without oxygen.
b.Carbon dioxide must constantly be removed to maintain the proper pH.
c.Little glucose is stored in nerve cells, so a constant supply is needed.
d.The brain needs a constant supply of insulin and thyroid hormone.
e.The brain swells easily and needs the blood supply to reduce swelling.
f.Circulating aldosterone levels maintain the fluid balance in the brain.

Answer 9

a,b,c,e