Vasopressors

Answer 1

1) Activation of alpha-1 adrenergic receptors, located in vascular walls, induces significant vasoconstriction.
2) Alpha-1 adrenergic receptors are also present in the heart and can increase the duration of contraction without increased chronotropy
.

Question 2

Beta adrenergic receptors

Answer 2

1) Beta-1 adrenergic receptors are most common in the heart and mediate increases in inotropy and chronotropy with minimal vasoconstriction. 2) Stimulation of beta-2 adrenergic receptors in blood vessels induces vasodilation

Question 3

Dopaminereceptors

Answer 3

present in the renal, splanchnic (mesenteric), coronary, and cerebral vascular beds; stimulation of these receptors leads to vasodilation. A second subtype of dopamine receptors causes vasoconstriction by inducingnorepinephrinerelease