MSCI 520 – Principles of Physiology I (Score for this quiz: 49 out of 50)
Quiz - Cardiovascular Physiology 2025-2026 Liberty University
Score for this quiz: 49 out of 50
Submitted Nov 23 at 8:38pm
This attempt took 80 minutes.
Question 1
pts
Which of these statements is accurate?
In the steady state, cardiac output is equal to venous return
Question 2
pts
Which of these is not an effect of an increased sympathetic outflow from the
nucleus tractus solitarus?
Increased venous dilation
Question 3
pts
Which of these is true about the plateau of a ventricular cell's action
potential?
All these are correct
Question 4
pts
The dihydropyridine receptors present in cardiac muscles are functionally
different from those in skeletal muscles in that they;
They serve to conduct extracellular calcium into the sarcoplasm of cardiac
muscles unlike the in skeletal muscles
, Question 5
pts
Sympathetic stimulation of the SA node causes an increase in inward Ca++
current, a decreased action potential threshold and an increased heart rate.
True
Question 6
pts
Which of these is least likely to promote renin secretion by the
juxtaglomerular cells?
Increased renal Na+ reabsorption
Question 7
pts
Which of these is not a common site of low-pressure baroreceptors?
Carotid sinus
Question 8
pts
Which of these best describes the effect of an increased heart rate on the
reduced ventricular filling phase of the cardiac cycle?
It reduces end-diastolic volume of the ventricle
Question 9
pts
You are evaluating a patient with intermittent clauditions in his right calf due
to peripheral artery disease and you discover that an atheroma has
decreased the diameter of his popliteal artery from 10mm to 5mm. This
results in a - fold increase in his popliteal artery resistance.
16
Quiz - Cardiovascular Physiology 2025-2026 Liberty University
Score for this quiz: 49 out of 50
Submitted Nov 23 at 8:38pm
This attempt took 80 minutes.
Question 1
pts
Which of these statements is accurate?
In the steady state, cardiac output is equal to venous return
Question 2
pts
Which of these is not an effect of an increased sympathetic outflow from the
nucleus tractus solitarus?
Increased venous dilation
Question 3
pts
Which of these is true about the plateau of a ventricular cell's action
potential?
All these are correct
Question 4
pts
The dihydropyridine receptors present in cardiac muscles are functionally
different from those in skeletal muscles in that they;
They serve to conduct extracellular calcium into the sarcoplasm of cardiac
muscles unlike the in skeletal muscles
, Question 5
pts
Sympathetic stimulation of the SA node causes an increase in inward Ca++
current, a decreased action potential threshold and an increased heart rate.
True
Question 6
pts
Which of these is least likely to promote renin secretion by the
juxtaglomerular cells?
Increased renal Na+ reabsorption
Question 7
pts
Which of these is not a common site of low-pressure baroreceptors?
Carotid sinus
Question 8
pts
Which of these best describes the effect of an increased heart rate on the
reduced ventricular filling phase of the cardiac cycle?
It reduces end-diastolic volume of the ventricle
Question 9
pts
You are evaluating a patient with intermittent clauditions in his right calf due
to peripheral artery disease and you discover that an atheroma has
decreased the diameter of his popliteal artery from 10mm to 5mm. This
results in a - fold increase in his popliteal artery resistance.
16
