試題詳解

34. Which of the following physiological responses to hemorrhage is correctly described?
(A) The increase in cardiac output due to hemorrhage results in enhanced venous return, which compensates for the blood loss.
(B) Hemorrhage causes a drop in blood pressure, and the baroreceptor reflex increases sympathetic activity, leading to vasoconstriction and increased heart rate to preserve blood pressure.
(C) Blood volume expansion following hemorrhage is mediated by parasympathetic activation, which reduces vasoconstriction.
(D) The physiological response to hemorrhage primarily involves vasodilation to improve blood flow to tissues affected by low blood volume.
(E) Shock caused by hemorrhage results in complete cessation of blood flow to the brain, leading to immediate neuronal death.