When experiencing stress and anxiety, the body's sympathetic nervous system is activated, releasing stress hormones like epinephrine and norepinephrine from the adrenal glands. These hormones act on the smooth muscles surrounding the blood vessels and cause:

The structure of capillary walls differs from veins and arteries in that they lack a tunica externa layer. Which of the following is the primary function of tunica externa?

Which cell type plays a key role in the development of atherosclerotic plaques in the intima media?

Baroreceptors are specialized sensory receptors found in the walls of some blood vessels, notably the carotid sinus. Which of the following is not a function of baroreceptors?