Cardiac Output and Venous Return

1.

Multiple Choice

30 sec

1 pt

Cardiac output increases during exercise.

True

False

2.

Multiple Choice

30 sec

1 pt

A person who has lost 500 ml of blood will have a higher preload compared to a person with normal blood volume.

True

False

3.

Multiple Choice

30 sec

1 pt

The term afterload is defined as

volume of blood in the ventricles

volume of blood in the atria during diastole

resistance to blood flow out of the ventricle during systole

pressure of left ventricle during diastole

4.

Multiple Select

30 sec

1 pt

Cardiac output is affected by

age/ gender/ body size

oxygen demand of body

viscosity of blood

5.

Multiple Choice

30 sec

1 pt

Which of the following causes an increase in cardiac output?

Increase in contractility and decreased in preload

increase in afterload

increase in both contractility and preload

increased in preload and decrease in contractility

6.

Multiple Choice

30 sec

1 pt

Calculate the Cardiac output

SV= 70 ml/beat

HR = 75 beats/min

5 L/min

5.25 L/min

5.5 L/min

5.35 L/min

7.

Multiple Select

30 sec

1 pt

Conditions that reduce cardiac output include

eating

heart disease

standing from lying position

adrenaline

8.

Multiple Choice

30 sec

1 pt

Where does the blood flow due to gravity?

upper extremities to superior vena cava

upper extremities to inferior vena cava

upper extremities to pulmonary artery

upper extremities to pulmonary vein

9.

Multiple Choice

30 sec

1 pt

The most important force in venous flow is

cardiac suction

the pressure generated by the heart.

the skeletal muscle pump.

the thoracic (respiratory) pump.

one way flow due to valves.

10.

Multiple Select

30 sec

1 pt

If heart rate increases to 180 beats/min (which is very fast) from the original 70 beats/min and stroke volume remains 70mL/beat the cardiac output increases from 4.9L/min to

12,600 mL/minute

12.6 L/min

13 mL/sec

13 mL/hr

11.

Multiple Choice

30 sec

1 pt

Calculate the CO with the following:

HR = 120 bpm

SV = 140 mL/beats

16,800 mL/min

16,800 L/sec

16,800 mL/hr

16,800 L/day

12.

Multiple Choice

30 sec

1 pt

Using the formulas for stroke volume, SV = EDV – ESV, and ejection fraction, EF = SV/EDV x 100%,

End-diastolic volume = 160 mL

End-systolic volume = 80 mL

What is the SV?

50 mL

60 mL

70 mL

80 mL

13.

Multiple Choice

30 sec

1 pt

Using the formulas for stroke volume, SV = EDV – ESV, and ejection fraction, EF = SV/EDV x 100%,

End-diastolic volume = 160 mL

End-systolic volume = 80 mL

What is the Ejection fraction?

25%

50%

75%

100%

14.

Multiple Choice

30 sec

1 pt

Using the formulas for stroke volume, SV = EDV – ESV, and ejection fraction, EF = SV/EDV x 100%,

End-diastolic volume = 100 mL

End-systolic volume = 50 mL

What is the SV?

30mL

40mL

50mL

60mL

15.

Multiple Choice

30 sec

1 pt

Using the formulas for stroke volume, SV = EDV – ESV, and ejection fraction, EF = SV/EDV x 100%,

End-diastolic volume = 100 mL

End-systolic volume = 50 mL

What is the EF?

45%

50%

55%

60%

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