Significant loss of blood volume causes an increase in which of the following?
1) Vascular tone
2) Secretion of antidiuretic hormone (ADH)
3) Heart rate
A)1, 2, and 3
B)2 and 3 only
C)1 and 3 only
D)1 and 2 only

Question

Quizplus · Accepted Answer

Significant loss of blood volume triggers compensatory mechanisms to maintain blood pressure and perfusion. Increased vascular tone (1) helps to maintain blood pressure by vasoconstriction. The secretion of antidiuretic hormone (ADH) (2) increases to promote water reabsorption in the kidneys, thus conserving fluid. An increase in heart rate (3) is also a compensatory response to improve cardiac output and maintain blood flow to vital organs.

Significant Loss of Blood Volume Causes an Increase in Which