Ch.21 hw

Question 1

Which of the following is the most important method of capillary exchange?

Answer 1

simple diffusion

Question 2

The largest driving force for pulling fluid from the interstitial spaced back into the capillaries is

Answer 2

blood colloid osmotic pressure

Question 3

The volume of blood that circulates through the systemic (or pulmonary) blood vessels per minute is called

Answer 3

cardiac output

Question 4

cardiac output is dependent on both

Answer 4

heart rate and stroke volume

Question 5

Which of the following would not result in an increase in arterial blood pressure?

Answer 5

increased arteriolar vasodilation

Question 6

Which of the following is not a contribution of the cardiovascular system to other body systems?

Answer 6

blood carries carbon dioxide to body tissues and removes oxygen for use by other organs

Question 7

The cardiovascular center is located

Answer 7

in the medulla oblongata

Question 8

Which of the following would not occur in response to hypovolemic shock?

Answer 8

release of atrial natriuertic peptide

Question 9

All the veins of the systemic circulation eventually drains into the

Answer 9

superior and inferior cava and coronary sinus

Question 10

The pulmonary trunk divides into

Answer 10

right and left pulmonary arteries

Question 11

What is the function of the hepatic portal system?

Answer 11

transport of venous blood from the gastrointestinal tract and spleen to the liver

Question 12

Which statement is not true of venous return to the heart?

Answer 12

the respiratory pump increases venous return to the left atrium

Question 13

Which statement is true about bulk flow?

Answer 13

Blood hydrostatic pressure is lower at the venous end of a capillary

Question 14

Which is not a feature of capillaries?

Answer 14

connect arterioles to veins

Question 15

Tunica media of an artery is comprised of

Answer 15

smooth muscle cells and connective tissue

Question 16

Most of the capillaries in the body are

Answer 16

Continuous capillaries

Question 17

While you are at rest, the greatest quantity of blood will be found in the

Answer 17

systemic veins and venules

Question 18

Large proteins and red blood cells can pass

Answer 18

through intercellular clefts in sinusoids

Question 19

In the metarterioles, smooth muscle tissue helps to regulate

Answer 19

the amount of blood flowing into the capillaries and vascular resistance

Question 20

The recoil of ____ helps to keep blood flowing during ventricular relaxation

Answer 20

elastic arteries

Question 21

Which does not increase blood pressure?

Answer 21

atrial natriuretic peptide

Question 22

Which of the following assist veins in returning blood to the heart?

Answer 22

valves, skeletal muscle pump and respiratory pump

Question 23

Net filtration is due to

Answer 23

blood hydrostatic pressure and blood colloid osmotic pressure

Question 24

Which does not increase blood pressure?

Answer 24

increased parasympathetic impulses

Question 25

Which of the following would not result in an increase in systemic vascular resistance?

Answer 25

decreased length of the systemic circulatory route