chapter 21

Blood pressure increases with

A,B,C

You would expect to find fenestrated capillaries in

the pituitary gland

Which of the following is the innermost layer of a blood vessel?

tunica intima

Which layer of a blood vessel contains concentric sheets of smooth muscle tissue?

tunica media

Venae cavae are the largest of what type of vessel?

vein

The large vessels that return blood to the heart are called

veins

After blood leaves the capillaries, it enters the

venules

The muscular layer in the wall of a blood vessel is the tunica

media

Exchange between a blood vessel and the cells that surround it can occur only in

capillaries

Venous valves are responsible for

channeling blood toward the heart

Capillaries that have a complete lining are called

continuous capillaries.

Tom loves to soak in hot tubs and whirlpools. One day, he decides to raise the temperature of the hot tub as high as it will go. After a few minutes in the very warm water, he feels faint, passes out, nearly drowns. He was fortunately saved by an observer. Why did this happen.

dilation of superficial veins caused a shift in blood to legs and arms resulting in decrease venous return which caused decrease in cardiac output and less blood to brain

Capillaries with a perforated lining are called A) B) C)

fenestrated capillaries.

Compared to arteries, veins

have thinner walls

Blood flow through a capillary is controlled by the

precapillary sphincter.

The difference between the systolic and diastolic pressures is called the

pulse pressure

The brachiocephalic artery that comes off of the aortic arch branches into

right common carotid and right vertebral artery

__________ is where the walls of the artery becomes thicker and tougher.

arteriosclerosis

You would expect to find fenestrated capillaries in

all of the above

Factors that increase the risk of atherosclerosis include which of the following?

all of the answers are correct

The functions of the pericardium include which of the following:

anchoring the heart to surrounding structures

Cindy has a low hematocrit and therefore her RBC's have a reduced hemoglobin content. She has no problems with growth or development. Cindy feels weakness, premature muscle fatigue and lack of energy. What is wrong with Cindy?

anemia