Which of the following mechanisms is used to regulate blood pressure in the closed circulatory system of vertebrates?
A) Changing the force of heart contraction
B) Constricting and relaxing sphincters in the walls of arterioles
C) Adjusting the volume of blood contained in the veins
D) All of the above
E) None of the above

Question

Quizplus · Accepted Answer

All of the mechanisms listed are used to regulate blood pressure in the closed circulatory system of vertebrates. Changing the force of heart contraction, constricting and relaxing sphincters in the walls of arterioles, and adjusting the volume of blood contained in the veins all play a role in regulating blood pressure.

Which of the Following Mechanisms Is Used to Regulate Blood