Cardio Exam 1

Front 1

The velocity of blood flowing through the circulatory system in what part of the circulation?

Back 1

capillaries

Front 2

Flow through a vessel occurs at 10 ml/min under a pressure gradient of 100 mm Hg. What would the flow through the vessel be after the diameter of the vessel was increased twoflold and the pressure gradient was maintained at 100 mm Hg?

Back 2

160
F = pie P r (4) / 8nl

Front 3

Which vessel has greatest flow?
A. Radius = 1
B. Radius = 2
C. Radius = 4
D. Radius = 6

Back 3

D. Radius = 6

Front 4

78 y.o woman has MAP 120 and HR of 60. She ahs SV of 50 ml and CO of 3000 ml/min. and right atrial pressure of 0 mm Hg. What is the toal peripheral resistance (in mm.Hg/ml/min) in this woman?

Back 4

C. .04
F = Change P/ R
R = change P/ F
R = 120 / 3000

Front 5

The tendency for turbulent flow is greatest in the?

Back 5

D. Aorta

Front 6

What can cause the largest increase in blood flow?

Back 6

C. A twofold increase in arteriole diameter

Front 7

60 yo man visit family practitioner for yearly exam. BP 180/100, HR 78, pulse pressure of 80. cholesterol level is in upper 25th percentile. A decrease in which of the following is most likely the explanation for the high pulse pressure in this patient?

Back 7

D. Arterial Compliance

Front 8

A 65 yo man is suffering from CHF. He has a CO of 4.0, BP of 115/85, and HR 90. Additional tests by cardio reveal tha thte pt ahs righ atrial pressure of 10. an increase in which of the following would be expected in this patient?

Back 8

A. Plasma colloid osmotic pressure

Front 9

Which part of the circulation has highest compliance?

Back 9

c. veins

Front 10

36 yo femal cash resgister attendent goes to MD c/o large surface veins in legs. BP 125/94, HR 78. she is 5ft 3 in tall and wighs 123 lbs. she has been jogging 2 miles each day for past 2 months. What is cause of varicose veins?

Back 10

E. Chronic exposure to excess venous pressure in her legs

Front 11

Which of the following would decrease venous hydrostatic pressure in th legs?

Back 11

C. movement of leg muscles

Front 12

An increase in which of the following would tend to decrease pulse pressure?

Back 12

C. Arterial Compliance

Front 13

Whcihc of the following components of the circulatory system has the largest distribution of blood volume?

Back 13

C. veins

Front 14

Whcihc of the following statements regarding circulation is correct?

Back 14

E. the compliance of the veins is greater than that of the arteries

Front 15

72 yo man has sugery to remove an abd tumor. Pathohistological studies reveal the tumor mass contains a large number of vessels. A decrease in which of the following is the most likely stimulus for the growth of vessels in a solid tumor

Back 15

D. Tissue oxygen concentration

Front 16

The arterial pressure o fan isolated, perfused muscle in increased from 100-140. High blood flow to the muscle is 5/100 and at 100 mmHG and 5.1/100 at 140 mm Hg. the maintenacne of blood flow despite the large elevation in arterial pressure is cause by an increase in which of the following?

Back 16

C. Arteriolar resistance

Front 17

Autoregulation of tissue blood flow in response to an increase in arterial pressure occurs as a result of ?

Back 17

C. Excess delivery of nutrients such as oxygen to the tissues

Front 18

Teh diameter of a precapillary arteriole is increased in a muscle vascular bed. A decrease in which of the following would be expected?

Back 18

E. Arteriole resistance

Front 19

An increase in tissue metabolism results in?

Back 19

B. An increase in tissue concentration of metabolites and an increase in arteriole diameter

Front 20

Reducing pressure in a muscle artery from 100 to 80 would result in which of the following conditions?

Back 20

C. Reduction in arteriole resistance and maintenance of normal blood flow

Front 21

Which one of the following would tend to decrease blood flow?

Back 21

D. an increase in tissue oxygen concentration

Front 22

A 22 yo man enter ER after severing amajor artery in motorcycle accident. it is estimated that he lost 700 ml of blood BP 90/55. A decrease in which of the following would be expected in response to hemorrage?

Back 22

E. number of impulses from the carotic sinus

Front 23

Blood is withdrawn from 56 yo with 5 yr history of CHF. Angio II, Aldosterone, and atrial natriuretic peptide are elevated. An increase in which of the following is most likely explanation for the increase in plasma levels of atrial natriuretic peptide

Back 23

D. Atrial Pressure

Front 24

A 45 yo was by MD for URI. her BP 158/94. She was asked to return on 2 other visits for BP checks. REpeat measeure were similiar. no history of HTN, no medical probles, Whcih diagnosis would you predict for theis woman?

Back 24

C. Essential Hypertension

Front 25

A 40 yo woman is hospitalized and has sever anemia. her CO is 12.5, Oxygen consumption is 250 ml/min and Pulm artery O2 is 160. What is the pulmonary vein O2 concentration of blood?

Back 25

D. 180
CO = O2 absorbed by lungs/ arterial venous O2 difference

Front 26

Which of the following would cause a leftward shift in the CO curve?

Back 26

D. Decreasing intrapleural pressure to -6.0 mm Hg

Front 27

Which of the following is mormally ass. with a decrease resistance to venous return?

Back 27

A. Hyperthyroidism

Front 28

Which of the following conditions is normally ass. with an increased mean systemic filing pressure?

Back 28

D. congestive heart failure

Front 29

Which one of the following conditions is normally ass. with an increased CO?

Back 29

C. Moderate Anemia

Front 30

A Patient with a resting CO of 4 L/min is exercised maximally and CO increases to 8. What is the cardiac reserve?

Back 30

D. 100%
New- Old / old

Front 31

Whichc one of the following conditions would be expected to decrease mena systemic filling pressure?

Back 31

D. Increased venous compliance

Front 32

Which one of the following would cause a leftward shift in the CO curve?

Back 32

B. Negative pressure breathing

Front 33

Which one of th efollowing conditions normally causes vasodilation of skeletal muscles arterioles during exercise?

Back 33

D. Decresed plasma adenosine concentration

Front 34

A 60 yo man has been told by his MD that he has angina pain caused by myocardial ischemia. Whcih of the following treatments would be beneficial?

Back 34

A. beta-receptor blockade

Front 35

most venous blood flow leaves the heart muscle through the ?

Back 35

C. coronary sinus

Front 36

A healthy 40 yo man has been exercising maximally for 15 minutes. Which of the following conditions is most likely present?

Back 36

A. Arteriolar resistance in the GI bed is increased 200%

Front 37

Which of the following is normally ass. with an increased tendency for the heart fibrillate after MI?

Back 37

A. Current of injury from ischemic cardiac muscle

Front 38

What is usually the most important controller of coronary blood flow?

Back 38

A. Adenosine

Front 39

The mass sympathetic charge at the beginning of exercise cause which of the following

Back 39

E. venoconstriction