Cardiovascular Mastering Exam Questions and Answers Latest Update already Passed
The anatomy of the intrinsic conduction system causes contraction of the ventricles to begin at the apex
and move superiorly. Why is this important? - Answers so blood is forced upward, toward the semilunar
valves
A person notices his or her heart beat because he or she senses blood being pumped by the heart.
Excessive caffeine intake can lead to irregular heart rhythms (arrhythmias) that patients perceive as
"skipped beats." Given that caffeine is a stimulant, which of the following mechanisms best explains the
reason for the feeling that the heart skipped a beat? - Answers Purkinje fibers initiate spontaneous
action potentials, which cause the ventricles to contract early.
Calculate the cardiac output if heart rate (HR) is 90 beats per minute, stroke volume (SV) is 110 ml/beat,
end diastolic volume (EDV) is 140 ml, and end systolic volume (ESV) is 30 ml. - Answers 9.9 L/min
An increase in sympathetic stimulation of the heart would increase stroke volume by increasing
__________. - Answers contractility
As part of a blood drive on campus for the American Red Cross, you and your friends have just donated
500 ml of blood. You are now relaxing at the student lounge, waiting for A&P lab to begin.
Unfortunately, even though you are thirsty, you haven't bothered to buy yourself a drink. Other than a
little soreness of the skin and tissue around your median cubital vein, you feel fine. How has your 500 ml
decrease in blood volume most likely affected your cardiac output, heart rate, and stroke volume? -
Answers no change in cardiac output, increased heart rate, decreased stroke volume
The apex of the heart is __________. - Answers inferior
What surface groove separates the right and left ventricles? - Answers interventricular sulcus
The pulmonary circuit involves blood flow from the heart to and from the: - Answers lungs
The vessels that deliver oxygen to the tissues of the body are part of the __________. - Answers
systemic circuit
Which of the following vessels carries oxygenated blood? - Answers pulmonary vein
Blood from the systemic circuit returns to the heart via the __________. - Answers vena cavae
How will the cardiac output change if you double the heart rate but reduce the stroke volume by one-
half? - Answers It will not change.
Which hormone decreases cardiac output by decreasing blood volume and preload? - Answers atrial
natriuretic peptide
What two values are needed in order to calculate cardiac output (CO) for a ventricle? - Answers stroke
volume (SV) and heart rate (HR)
The anatomy of the intrinsic conduction system causes contraction of the ventricles to begin at the apex
and move superiorly. Why is this important? - Answers so blood is forced upward, toward the semilunar
valves
A person notices his or her heart beat because he or she senses blood being pumped by the heart.
Excessive caffeine intake can lead to irregular heart rhythms (arrhythmias) that patients perceive as
"skipped beats." Given that caffeine is a stimulant, which of the following mechanisms best explains the
reason for the feeling that the heart skipped a beat? - Answers Purkinje fibers initiate spontaneous
action potentials, which cause the ventricles to contract early.
Calculate the cardiac output if heart rate (HR) is 90 beats per minute, stroke volume (SV) is 110 ml/beat,
end diastolic volume (EDV) is 140 ml, and end systolic volume (ESV) is 30 ml. - Answers 9.9 L/min
An increase in sympathetic stimulation of the heart would increase stroke volume by increasing
__________. - Answers contractility
As part of a blood drive on campus for the American Red Cross, you and your friends have just donated
500 ml of blood. You are now relaxing at the student lounge, waiting for A&P lab to begin.
Unfortunately, even though you are thirsty, you haven't bothered to buy yourself a drink. Other than a
little soreness of the skin and tissue around your median cubital vein, you feel fine. How has your 500 ml
decrease in blood volume most likely affected your cardiac output, heart rate, and stroke volume? -
Answers no change in cardiac output, increased heart rate, decreased stroke volume
The apex of the heart is __________. - Answers inferior
What surface groove separates the right and left ventricles? - Answers interventricular sulcus
The pulmonary circuit involves blood flow from the heart to and from the: - Answers lungs
The vessels that deliver oxygen to the tissues of the body are part of the __________. - Answers
systemic circuit
Which of the following vessels carries oxygenated blood? - Answers pulmonary vein
Blood from the systemic circuit returns to the heart via the __________. - Answers vena cavae
How will the cardiac output change if you double the heart rate but reduce the stroke volume by one-
half? - Answers It will not change.
Which hormone decreases cardiac output by decreasing blood volume and preload? - Answers atrial
natriuretic peptide
What two values are needed in order to calculate cardiac output (CO) for a ventricle? - Answers stroke
volume (SV) and heart rate (HR)
