Which of the following is not part of the vasomotor control mechanism?
A) The vasoconstrictor center in the medulla
B) Sympathetic stimulation of smooth muscles surrounding the resistance vessels
C) Sympathetic stimulation of the heart to increase cardiac output
D) All of the above are part of the vasomotor control mechanism.

Question

Quizplus · Accepted Answer

Sympathetic stimulation of the heart to increase cardiac output is not part of the vasomotor control mechanism. The vasomotor control mechanism primarily involves the vasoconstrictor center in the medulla and sympathetic stimulation of smooth muscles surrounding the resistance vessels to regulate blood pressure and blood flow to different tissues and organs. However, sympathetic stimulation of the heart can indirectly affect blood pressure by increasing cardiac output, which is the volume of blood pumped by the heart per minute.

Which of the Following Is Not Part of the Vasomotor