Author Question: What is the primary response to alpha-1 receptor stimulation? a. Bronchodilation b. Tachycardia ... (Read 46 times)

hbsimmons88 · **on:** Jul 24, 2018

What is the primary response to alpha-1 receptor stimulation?

a. Bronchodilation
b. Tachycardia
c. Vasoconstriction
d. Uterine relaxation

Question 2

A patient with chronic obstructive pulmonary disease (COPD) reports having insomnia and a racing heart after starting terbutaline therapy. Which explanation by the nurse is most accurate?

a. The symptoms are typical and indicate that the medication is at a therapeutic level.
b. The symptoms will tend to resolve with continued therapy.
c. The symptoms are unusual and need to be reported to the health care provider immediately.
d. The symptoms are indicative of toxicity.

maya.nigrin17@yahoo.com · **Reply #1 on:** Jul 24, 2018

Answer to Question 1

ANS: C
Stimulation of the alpha-1 receptors causes vasoconstriction of all blood vessels throughout the body. Alpha-1 receptor stimulation causes bronchoconstriction . Alpha-1 receptor stimulation does not cause tachycardia. Beta-2 receptor stimulation produces relaxation of smooth muscle tissue, such as the uterus.

Answer to Question 2

ANS: B
Terbutaline, an adrenergic agent effective for bronchodilation, can cause excessive central nervous system (CNS) stimulation. Adverse effects such as palpitations, tachycardia, flushed skin, dizziness, and tremors tend to be mild and resolve with continued therapy. The therapeutic level can only be determined by analyzing a blood sample. These are common symptoms and should only be reported if they persist. Symptoms of toxicity are chest pain, persistent palpitations, and tachycardia.