Chapter 17: Heart Review Questions

25 July 2022
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question
Which heart chamber receives oxygenated blood from the lungs?
answer
left atrium
question
What is the period during the cardiac cycle when the ventricles are completely closed and blood volume in them remains constant as the ventricles contract?
answer
isovolumetric contraction phase
question
Suppose a patient develops a myocardial infarction that disables the sinoatrial node. Would the heart still pump blood to the aorta and the pulmonary trunk?
answer
Yes, because the atrioventricular node will still stimulate ventricular systole.
question
The presence of an incompetent tricuspid valve would have the direct effect of causing ______.
answer
reduced efficiency in the delivery of blood to the lungs
question
Increasing end-diastolic and end-systolic volume will increase stroke volume. Increasing end-diastolic and end-systolic volume will increase stroke volume. True False
answer
false
question
Which of the following does NOT deliver deoxygenated blood to the heart? -inferior vena cava -pulmonary veins -superior vena cava -coronary sinus
answer
pulmonary veins
question
Hypercalcemia could cause ______.
answer
prolonged t-wave
question
In an ischemic heart, the affected cardiac muscle cells are likely to have an altered ______.
answer
resting membrane potential
question
Besides cardiac muscle, what other tissue type possesses pacemaker cells?
answer
smooth muscle
question
Heart murmurs caused by a stenotic mitral valve ______.
answer
are detected while blood flow into the left ventricle is reduced
question
Role of Chordae Tendenae (heart strings)
answer
to anchor the AV valves against the large pressure changes that occur as the ventricles contract.
question
Blood enters the left and right coronary arteries directly from which vessel or chamber?
answer
aorta
question
Which of these muscles is particularly associated with anchoring the right and left atrioventricular valves?
answer
papillary muscles
question
Which chamber of the heart sends oxygenated blood to the systemic circuit via the aorta?
answer
L Ventricle
question
What causes heart sounds?
answer
heart valve closure
question
what seperates the parietal and visceral pericardia?
answer
pericardial cavity