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6. which term refers to the amount of blood pumped by the heart in 1 minute?
- cardiac output
- straling's law of the heart
- stroke volume
- inotropic effect
7. an ejection fraction of 30% is:
- characteristic of a failing heart
- the amount of oxygenated hemoglobin in the blood in the left ventricle
- normal
- characteristic of a healthy person who is engaged in aerobic exercise
8. what is the significance of elevated plasma levels of AST, CPK, and LDH?
- myocardial damage as in myocardial infraction
- an increase in coronary blood flow
- early onset exertional angina
- a normal myocardial response to exercise
9. decreased blood flow through the coronary arteries is most likely to cause:
- angina pectoris
- bradycardia
- pulmonary edema
- valve damage
10. what is the term for the sequence of events that occur during one heart beat?
- cardiac cycle
- systole
- cardiac output
- stroke volume
11. which of the following is not part of the coronary circulation?
- pulmonary veins
- circumflex artery
- left anterior descending artery
12. ventricular systole refers to:
- the opening of the valves of the ventricles
- ventricular filling
- contraction of the ventricular myocardium
- ventricular depolarisation
13. referring to the ECG, the QRS complex represents ventricular:
- contraction
- depolarisation
- relaxation
- repolarisation
14. with which of the following is "lubb-dupp" associated?
- diffusion of O2 from the lungs to the blood in the pulmonary capillaries
- closing of the heart valves
- myocardial contraction
- ventricular depolarisation
15. most of the symptoms of acute left-sided heart failure are:
- relieved by morphine
- confined to the lower extremities, as in pedal edema
- respiratory in nature (e.g., dyspnea, orthopnea)
- cured by an antibiotic
16. the atrioventricular node (AV node):
- has a rate that is normally faster than the SA node
- delays the electrical signal coming from the atria into the ventricles
- is the pacemaker of the heart
- is located in the upper part of the right atrium
17. which of the following is a function of a valve?
- regulates the amount of oxygen bound to hemoglobin
- regulates heart rate
- regulates the direction of the flow of blood through the heart
- directs the movement of the cardiac impulse
18. what happens during ventricular diastole?
- the ventricles are filling with blood
- both AV valves are closed
- all semilunar valves are open
- blood is pumped to the lungs and systemic circulation
19. which of the following is descriptive of the vagus nerve?
- fight or flight
- adrenergic
- parasympathetic
- sympathetic
20. heart rate and stroke volume determine:
- total blood volume
- hematocrit
- cardiac output
- the size of the heart valves