quiz 1-2

Question 1

preload is one of the factors affecting stroke volume. what is preload?

Answer 1

the degree of stretch of the myocardium

Question 2

Tachycardia is described as a. HR > 100bpm b. HR< 60bpm c. Enlargement of the heart

Answer 2

a. HR > 100bpm

Question 3

ESV is described as a. volume of blood leaving ventricles b. volume of blood entering ventricles c. volume of blood in ventricles after diastole d. volume of blood in ventricles after systole

Answer 3

d. volume of blood in ventricles after systole

Question 4

Which layer (or tunic) of the blood vessel wall is composed of smooth muscle?
a. tunica intima         b. tunica externa c. tunica media           d. tunica adventitia

Answer 4

c. Tunica media

Question 5

what type of capillary makes up the blood brain barrier? a. continuous b. sinusoidal c. fenestrated

Answer 5

a. continuous

Question 6

where would you find fenestrated capillaries? a. kidney b. liver c. skin and muscle d. bone marrow

Answer 6

Kidney

Question 7

when would you expect to find precapillary sphincters constricted in the skeletal muscles? a. during intense activities such as running b. during digestion

Answer 7

b. during digestion

Question 8

high pressure in the capillaries may cause the capillaries to release too much solutes into tissues? a. true b. false

Answer 8

true

Question 9

antidiuretic hormone (ADH) is released in order to___. a. increase BP b. Decrease BP

Answer 9

a. increase BP

Question 10

which of the following is not a function of angiotensin II? a. vasoconstriction b. cause adrenal gland to release Aldosterone c. cause pituitary gland to release ADH d. cause kidneys to excrete Na+ and H2O

Answer 10

d. cause kidneys to excrete Na+ and H2O

Question 11

increased activity of the vasomotor center leads to___. a. vasoconstriction b. vasodialation c. decreased heart rate

Answer 11

a. vasoconstriction

Question 12

which of the following are considered complete cells? a. red blood cells b. white blood cells c. platelets

Answer 12

b. white blood cells

Question 13

what is the average blood volume (in liters) in males? a. 2-3L b. 5-6L c. 8-9L d. 9-10L

Answer 13

b. 5-6L

Question 14

A second increase in aortic pressure when aortic semilunar valves close and blood rebounds off the valves is marked as the

Answer 14

Dicrotic notch

Question 15

Cardiac output is equal to

Answer 15

stroke volume x heart rate

Question 16

The second heart sound, “dub” is heard in which phase of the cardiac cycle?

Answer 16

Ventricular systole

Question 17

Which layer of the blood vessel wall is composed of smooth muscle?

Answer 17

Tunica Media

Question 18

Which of the following depolarizes at 75 bpm with the influence of the vagus nerve?

Answer 18

SA node

Question 19

The AV bundle sends action potentials to

Answer 19

AV bundle

Question 20

The QRS complex of the ECG represents

Answer 20

Ventricular depolarization

Question 21

Preload is one of the factors affecting stroke volume, what is preload?

Answer 21

The degree of stretch of the myocardium

Question 22

ESV is described as

Answer 22

The volume of blood in ventricles after systole.