Author Question: A nurse learns about a drug that interferes with transmitter storage in the PNS. The transmitter ... (Read 101 times)

gbarreiro · **on:** Jul 23, 2018

A nurse learns about a drug that interferes with transmitter storage in the PNS. The transmitter affected by this drug causes an increased heart rate. What response will the nurse expect to see when this drug is administered?

a. Bradycardia
b. Positive inotropic effects
c. Prolonged receptor activation
d. Tachycardia

Question 2

A nurse is administering drug X to a patient. The drug information states that the drug acts by activating receptors in the peripheral nervous system by increasing transmitter synthesis. The nurse understands that the effect of this drug is to:

a. activate axonal conduction.
b. enhance transmitter storage.
c. increase receptor activation.
d. synthesize supertransmitters.

lgoldst9 · **Reply #1 on:** Jul 23, 2018

Answer to Question 1

ANS: A
Drugs that interfere with transmitter storage reduce receptor activation, because disruption of storage decreases the amount of transmitter available for release. Because this transmitter increases the heart rate, the result will be a decrease in the heart rate. Inotropic effects control the force of contraction, not the rate of contraction. Decreased transmitter storage would result in decreased receptor activation. Tachycardia would occur if transmitter availability were increased.

Answer to Question 2

ANS: C
Drugs that increase transmitter synthesis increase receptor activation. Other drugs that alter transmitter synthesis can decrease synthesis and would cause decreased receptor activation. Drugs that affect transmitter production do not exert their effects on axonal conduction. The amount of transmitter produced does not directly affect transmitter storage. Some drugs that alter transmitter synthesis cause the synthesis of transmitter molecules that are more effective than the transmitter itself.