Pharmacology of the Cardiovascular and Central Nervous Systems
71. Tachycardia due to digoxin intoxication can be treated by:
a. T: has membrane-stabilizing effect on myocardium.
b. F
c. F
d. F
72. Verapamil:
a. T
b. F
c. F: prolongs the refractory period.
d. F: decreases SA nodal discharge.
73. Triamterene:
a. T
b. F: acts on the distal tubule via an aldosterone-independent mechanism to decrease reabsorption of sodium.
c. F
d. T
74. Methyldopa:
a. F: is a false neurotransmitter which acts on central alpha2 receptors in the brainstem vasomotor center to decrease blood pressure.
b. T
c. T
d. T
75. Inhibition of angiotensin-converting enzyme:
a. F: decrease conversion of angiotensin I to angiotensin II.
b. T
c. T
d. F
76. Intravenous thiopentone:
a. T
b. T
c. T
d. T
77. The following general anaesthetics are avoided in electrocautery:
a. T: no longer used in anaesthesia due to inflammatory and explosive properties.
b. F
c. T
d. F
78. The benzodiazepines possess the following properties:
a. T: clonazepam, nitrazepam, flurazepam and diazepam have prominent anti-convulsant properties compared to the others.
b. T
c. T
d. F
79. L-dopa in Parkinsonism can be given with:
a. F: chlorpromazine is a dopamine antagonist which blocks dopamergic transmission in the mesolimbic pathway.
b. T
c. F
d. F
80. Phenobarbitone:
a. T
b. T
c. T: only 2 -3% excreted unchanged by the liver.
d. T