In vertebrates, cardiac output and regional blood flow are regulated by
A) parasympathetic nerves.
B) sympathetic nerves.
C) histamines.
D) adrenaline.
E) All of the answers are correct.

Question

Quizplus · Accepted Answer

Cardiac output and regional blood flow in vertebrates are regulated by a combination of factors including parasympathetic nerves (which can decrease heart rate), sympathetic nerves (which can increase heart rate and force of contraction), histamines (which can affect the diameter of blood vessels and thus alter blood flow), and adrenaline (which increases heart rate and cardiac muscle contraction, also affecting blood flow).

In Vertebrates, Cardiac Output and Regional Blood Flow Are Regulated