Deck 20: Adrenergic Drugs

Question 1

To increase cardiac output,a drug should selectively _____ receptors on the heart.

A)stimulate alpha-1
B)inhibit alpha-1
C)stimulate alpha-2
D)inhibit alpha-2
E)stimulate beta-1

Answer 1

stimulate beta-1

Question 2

A drug that selectively stimulates alpha-1 adrenergic receptors will cause:

A)vasoconstriction of peripheral arterioles.
B)increased heart rate.
C)decreased blood pressure.
D)bronchodilation.
E)all of the above

Answer 2

vasoconstriction of peripheral arterioles.

Question 3

Stimulation of alpha-2 adrenergic receptors on spinal interneurons typically results in _______ in excitability of ______ supplied by these interneurons.

A)an increase;motor neurons
B)a decrease;motor neurons
C)an increase;sensory
D)a decrease;sensory
E)none of the above;alpha-2 receptors are not located in the spinal cord

Answer 3

a decrease;motor neurons

Question 4

Adrenergic antagonists that are selective for the beta-1 subtype (i.e. ,beta-1 blockers)can be useful in the treatment of:

A)high blood pressure.
B)heart failure.
C)certain cardiac arrhythmias.
D)recovery from myocardial infarction.
E)all of the above

Question 5

Bronchospasms associated with respiratory ailments such as asthma,bronchitis,and emphysema are often treated with:

A)beta-1 adrenergic agonists.
B)beta-1 adrenergic antagonists (blockers).
C)beta-2 adrenergic agonists.
D)beta-2 adrenergic antagonists (blockers).
E)alpha-1 adrenergic agonists.