NR507 MIDTERM EXAM QUESTIONS &
ACTUAL CORRECT ANSWERS
How does blood flow through the heart? - correct answer ✔✔Deoxygenated venous blood →
Sup. Vena Cava → Right Atrium →Tricuspid (AV) →Empties into R. Ventricle (& it contracts) →
Blood ejected through Pulmonary Valve → Pulmonary Artery → Lungs to be Oxygenated →
Pulmonary Veins → L. Atrium → Mitral (AV) → L. Ventricle (pumps with each contraction) →
Aortic Valve → Aorta → Body
What is systole? - correct answer ✔✔Contraction of the heart which pumps blood
Diastole - correct answer ✔✔Relaxation of the heart
What produces S1 and S2 sound? - correct answer ✔✔closing of the heart valves
What produces S1? - correct answer ✔✔The mitral and tricuspid valves which close in systole
What produces S2 sound? - correct answer ✔✔The closing of the aortic and pulmonic valves in
diastole
What is cardiac output? - correct answer ✔✔the volume of blood pumped out by each ventricle
per minute
What is stroke volume? - correct answer ✔✔amount of blood pumped out by each ventricle
with contraction
What determines cardiac output? - correct answer ✔✔stroke volume and heart rate
, What is preload? - correct answer ✔✔the degree of stretch on the heart before it contracts,
related to ventricular filling, end diastolic pressure, amount of blood entering the ventricle
during diastole
What is afterload? - correct answer ✔✔resistance left ventricle must overcome to circulate
blood
What is contractility? - correct answer ✔✔Normal ability of muscle to contract at a given force
for a given stretch. It is independent of preload/afterload
Will sustained tachycardia result in increased or decreased stroke volume? - correct answer
✔✔Decreased
What conditions can result in decreased contractility? - correct answer ✔✔Ischemia, acidosis,
cardiomyopathy
What can cause increase afterload? - correct answer ✔✔HTN, pulmonary disease, damage to
the aortic valve
What has the most immediate effect on afterload? - correct answer ✔✔HTN
Why would hemorrhaging cause decreased afterload? - correct answer ✔✔Decreased volume
of blood creates less resistance
What does increased preload do to stroke volume? - correct answer ✔✔Increases stroke
volume, over time the body will be unable to compensate however
ACTUAL CORRECT ANSWERS
How does blood flow through the heart? - correct answer ✔✔Deoxygenated venous blood →
Sup. Vena Cava → Right Atrium →Tricuspid (AV) →Empties into R. Ventricle (& it contracts) →
Blood ejected through Pulmonary Valve → Pulmonary Artery → Lungs to be Oxygenated →
Pulmonary Veins → L. Atrium → Mitral (AV) → L. Ventricle (pumps with each contraction) →
Aortic Valve → Aorta → Body
What is systole? - correct answer ✔✔Contraction of the heart which pumps blood
Diastole - correct answer ✔✔Relaxation of the heart
What produces S1 and S2 sound? - correct answer ✔✔closing of the heart valves
What produces S1? - correct answer ✔✔The mitral and tricuspid valves which close in systole
What produces S2 sound? - correct answer ✔✔The closing of the aortic and pulmonic valves in
diastole
What is cardiac output? - correct answer ✔✔the volume of blood pumped out by each ventricle
per minute
What is stroke volume? - correct answer ✔✔amount of blood pumped out by each ventricle
with contraction
What determines cardiac output? - correct answer ✔✔stroke volume and heart rate
, What is preload? - correct answer ✔✔the degree of stretch on the heart before it contracts,
related to ventricular filling, end diastolic pressure, amount of blood entering the ventricle
during diastole
What is afterload? - correct answer ✔✔resistance left ventricle must overcome to circulate
blood
What is contractility? - correct answer ✔✔Normal ability of muscle to contract at a given force
for a given stretch. It is independent of preload/afterload
Will sustained tachycardia result in increased or decreased stroke volume? - correct answer
✔✔Decreased
What conditions can result in decreased contractility? - correct answer ✔✔Ischemia, acidosis,
cardiomyopathy
What can cause increase afterload? - correct answer ✔✔HTN, pulmonary disease, damage to
the aortic valve
What has the most immediate effect on afterload? - correct answer ✔✔HTN
Why would hemorrhaging cause decreased afterload? - correct answer ✔✔Decreased volume
of blood creates less resistance
What does increased preload do to stroke volume? - correct answer ✔✔Increases stroke
volume, over time the body will be unable to compensate however
