Describe neural and chemical (both systemic and local) effects exerted on the blood vessels when you are fleeing from a mugger. (Be careful, this is more involved than it appears at first glance.)

Which of the following statements is true?

Which blood vessel layer contains the greatest proportion of collagen?

Which blood vessel tunic has the most active role in controlling blood flow?

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

b. The tunica intima is composed of a sheet of endothelium, connective tissue, and the internal elastic lamina.

Collagen vascular diseases weaken the collagen in the tunica externa of blood vessels. Predict the effects of such a disease.