Cardiovascular Review Questions

Question 1

True or False

Resting heart rate of an endurance trained person is usually lower than that of an unfit person.

Answer 1

True

Question 2

True or False

Resting stroke volume is approximately the same in untrained and trained persons.

Answer 2

False

Question 3

True or False

Cardiac output is calculated by adding stroke volume and heart rate

Answer 3

False

Question 4

True or False

Once stroke volume reaches a maximum, any further increase in cardiac output is brought about by increase in heart rate.

Answer 4

True

Question 5

True or False

The QRS complex of the ECG represents ventricular depolarization

Answer 5

True

Question 6

True or False

The P-wave of the ECG represents atrial relaxation.

Answer 6

False

Question 7

True or False

The heart responds to a training stimulus just as any other muscle.

Answer 7

True

Question 8

True or False

Blood flow to the heart muscle increases by more than 4 fold during maximal work.

Answer 8

True

Question 9

True or False

Maximal cardiac output and maximal VO2 are linearly related.

Answer 9

True

Question 10

True or False

1Stroke volume reaches a maximum value at about 50-70% of max VO2

Answer 10

True

Question 11

True or False

The heart may be considered to be two separate pumps.

Answer 11

True

Question 12

True or False

The superior and inferior vena cavae return venous blood to the right ventricle.

Answer 12

False

Question 13

True or False

The pulmonary vein contains oxygenated blood

Answer 13

True

Question 14

True or False

The aorta contains oxygenated blood

Answer 14

True

Question 15

True or False

The mitral valve, a bicuspid valve, controls blood flow between the left atrium and left ventricle.

Answer 15

True

Question 16

True or False

A heart murmur occurs when there is an electrical conduction disturbance in the heart.

Answer 16

False

Question 17

True or False

The term cardiac cycle refers to the electrical and mechanical events that occur in the heart during the course of a single heartbeat.

Answer 17

True

Question 18

True or False

The contractile phase of the cardiac cycle is referred to as systole.

Answer 18

True

Question 19

True or False

The relaxation phase of the cardiac cycle is referred to as diastole.

Answer 19

True

Question 20

True or False

The PR interval represents the time required for the depolarization wave to pass through both atria.

Answer 20

False

Question 21

True or False

The R to R interval represents one complete cardiac cycle

Answer 21

True

Question 22

True or False

Normal heart sounds are a result of the vibrations of the heart valves as they open.

Answer 22

False (as they close)

Question 23

True or False

Right ventricular pressure is only about 1/6th as great as left ventricular pressure

Answer 23

True

Question 24

True or False

Over the course of one minute period, the amount of blood entering the right atrium is equal to the amount of blood ejected from the left ventricle.

Answer 24

True

Question 25

True or False The amount of oxygen needed to lift an object of same weight and same height is the same for trained and untrained person

Answer 25

True If work is the same, then oxygen requirement is the same

Question 26

True or False Maximum cardiac output in a well-trained athlete reaches higher values compared with untrained persons during exercise.

Answer 26

True Because they have higher max VO₂ levels and can take their HR higher. Resting CO is the same between the two.

Question 27

True or False It is not unusual to find maximal cardiac outputs in athletes exceeding 25 to 30 liters per minute.

Answer 27

True

Question 28

True or False In general, the higher the maximal cardiac output, the higher the aerobic power

Answer 28

True

Question 29

True or False The large changes in cardiac output, in response to exercise, are brought about by changes in stroke volume and heart rate

Answer 29

True

Question 30

True or False Resting stroke volume for untrained and trained persons is about the same.

Answer 30

False

Question 31

True or False At a given exercise intensity, heart rate is relatively slower in a trained subject than an untrained subject.

Answer 31

True

Question 32

True or False An increase in the a-vo2 difference during exercise means that a larger percentage of the available oxygen is being extracted from blood as it passes through the muscle beds

Answer 32

True

Question 33

True or False Training enhances the maximal a-vo2 difference.

Answer 33

True

Question 34

True or False Resistance to blood flow decreases during heavy exercise.

Answer 34

True