Topic 4: Cardiovascular System

Question 1

These are the smallest blood vessels in our body.
a. venules b. arterioles c. capillaries d. venous sinuses

Answer 1

c. capillaries

Question 2

This is the muscular layer of blood vessels.
a. tunica media b. tunica externa c. tunica intima d. tunica interna

Answer 2

a. tunica media

Question 3

Venules unite to form ____?
a. veins b. capillaries c. arterioles d. venae cavae

Answer 3

a. veins

Question 4

All of the following are found in large arteries except ____?
a. elastic tissue b. smooth muscle c. endothelium d. valves

Answer 4

d. valves

Question 5

These vessels carry blood towards the heart.
a. arterioles b. capillaries c. arteries d. venules

Answer 5

d. venules

Question 6

The exchange between blood vessels and cells occurs here.
a. arterioles b. capillaries c. arteries d. all of the above

Answer 6

b. capillaries

Question 7

These vessels control blood flow to tissues.
a. arterioles b. elastic arteries c. capillaries d. muscular arteries

Answer 7

a. arterioles

Question 8

These vessels also serve as a blood reservoir.
a. arteries b. veins c. capillaries d. all of the above

Answer 8

b. veins

Question 9

If you have a blood pressure of 120/80 mmHg, what is your diastolic pressure?
a. 40 mmHg b. 80 mmHg c. 120mmHg d. 200 mmHg

Answer 9

b. 80mmHg

Question 10

If you have a blood pressure of 110/80 mmHg, what is the pulse pressure?
a. 30 mmHg b. 80 mmHg c. 110 mmHg d. 190 mmHg

Answer 10

a. 30 mmHg

Question 11

Blood flow is inversely proportional to the ____?
a. systolic pressure b. peripheral resistance c. difference in blood pressure d. diastolic pressure

Answer 11

b. peripheral resistance

Question 12

Which of the following blood vessel types have the greatest effect on peripheral resistance?
a. arteries b. arterioles c. veins d. venules

Answer 12

b. arterioles

Question 13

Gaining weight may increase blood pressure because increased adipose tissue causes an increase in ____?
a. blood pressure diameter b. blood vessel length c. blood viscosity d. cardiac output

Answer 13

b. blood vessel length

Question 14

The amount of blood pumped out of each ventricle in 1 minute is called ____?
a. stroke volume b. cardiac output c. cardiac reserve d. end diastolic volume

Answer 14

b. cardiac output

Question 15

An increase in blood pressure would have which effect on cardiac output?
a. increase b. decrease c. no effect d. varies from person to person

Answer 15

a. increase

Question 16

Once fluid enters the lymphatic system, it is called ____?
a. tissue fluid b. blood c. lymph d. plasma

Answer 16

c. lymph

Question 17

The thoracic duct receive lymph from ____?
a. the upper left body b. the upper right body c. the lower body d. both a and c

Answer 17

d. both a and c (the upper left body and the lower body)

Question 18

Fluid enters the lymph system directly from the ____?
a. blood capillaries b. interstitial space c. lymph-collecting ducts d. lymph trunks

Answer 18

b. interstitial space

Question 19

What percentage of our blood is plasma?
a. 90 b. 55 c. 45 d. 65

Answer 19

b. 55%

Question 20

The most abundant plasma protein is ____?
a. heparin b. globulin c. albumin d. fibrinogen

Answer 20

c. albumin

Question 21

Which organ produces most of the plasma proteins?
a. red bone marrow b. liver c. kidney d. thymus

Answer 21

b. liver

Question 22

Which of the following components is a complete cell?
a. erythrocyte b. leukocyte c. platelet d. all are complete cells

Answer 22

b. leukocyte

Question 23

Where does haematopoiesis occurs in adults?
a. proximal diaphysis of the femur b. proximal epiphysis of the humerus c. Distal diaphysis of the humerus d. distal epiphysis of the femur

Answer 23

b. proximal epiphysis of the humerus

Question 24

Which of the following is present in a mature red blood cell?
a. nucleus b. plasma membrane c. ribosome d. mitochondrion

Answer 24

b. plasma membrane

Question 25

Red blood cells enter the bloodstream as ____? a. erythroblasts b. reticulocytes c. hemocytoblasts d. normoblasts

Answer 25

b. reticulocytes

Question 26

Cardiac muscle tissue is found in which layer of the heart? a. endocardium b. myocardium c. epicardium d. pericardium

Answer 26

b. myocardium

Question 27

The valve is found between the right atrium and the right ventricle. a. mitral b. tricuspid c. bicuspid d. semilunar

Answer 27

b. tricuspid

Question 28

Which blood vessels leave the heart and transport blood to the lungs? a. venae cavae b. aorta c. pulmonary arteries d. pulmonary veins

Answer 28

c. pulmonary arteries

Question 29

These structures prevent prolapse of the atrioventricular valves. a. chordae tendineae b. crista terminalis c. trabeculae carneae d. intercalated discs

Answer 29

a. chordae tendineae

Question 30

Blood is carried to the heart by these vessels. a. arteries b. veins c. auricles d. capillaries

Answer 30

b. veins

Question 31

Of the following, what is the best definition of arteries? a. carry oxygenated blood b. carry blood away from the heart c. carry deoxygenated blood d. carry blood towards the heart

Answer 31

b. carry blood away from the heart

Question 32

Blood being pumped out of the left ventricle enters the ____? a. pulmonary artery b. aorta c. coronary sinus d. vanae cavae

Answer 32

b. aorta

Question 33

Blood is prevented from flowing back into the left ventricle by the ____? a. aortic semilunar valve b. tricuspid valve c. pulmonary semilunar valve d. mitral valve

Answer 33

a. aortic semilunar valve

Question 34

Deoxygenated blood from the myocardium enters the right atrium through the ____? a. cardiac veins b. coronary arteries c. coronary sinus d. superior vena cava

Answer 34

c. coronary sinus