10-05-2006, 02:20 PM
A 45-year-old comatose man is brought to the emergency department. Physical examination reveals profound dehydration and tachycardia. Laboratory studies show severe hyperglycemia (800 mg/dL) and glycosuria. Plasma osmolality is 340 mosm/L and there is no significant ketosis. It was determined that he was taking an arterial vasodilator that has which of the following mechanisms?
A. Activates K+ATP channels
B. Activates nitric oxide synthase
C. Activates voltage-gated Ca2+ channels
D. Blocks alpha-1 adrenergic receptors
E. Blocks angiotensin II receptors
F. Blocks beta-1 adrenergic receptors
A. Activates K+ATP channels
B. Activates nitric oxide synthase
C. Activates voltage-gated Ca2+ channels
D. Blocks alpha-1 adrenergic receptors
E. Blocks angiotensin II receptors
F. Blocks beta-1 adrenergic receptors