3/7/24, 8:31 AM
Quiz: Cardiovascular Physiology: MSCI520: Principles of Physiology I (C01)
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Quiz: Cardiovascular Physiology
Due Mar 3 at 11:59pm
Points 50
Questions 50
Time Limit 100 Minutes
Instructions
Attempt History
Attempt Time Score
LATEST Attempt 1 97 minutes 40 out of 50
Correct answers are hidden.
Score for this quiz: 40 out of 50
Submitted Mar 1 at 9:49am
This attempt took 97 minutes.
IncorrectQuestion 1
0 / 1 pts
The fourth heart sound is heard here
The atria contract
The T wave is present
Coincides with the nal phase of ventricular ling
The quiz:
Covers the Learn material from Module 3: Week 3.
Contains 50 multiple-choice questions.
Is limited to 100 minutes.
Allows 1 attempt.
Is worth 50 points.
Submit this assignment by 11:59 p.m. (ET) on Sunday of Module 3: Week 3.
Which of these is not an event of atrial systole in the cardiac cycle?
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3/7/24, 8:31 AM
Quiz: Cardiovascular Physiology: MSCI520: Principles of Physiology I (C01)
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Question 2
1 / 1 pts
It reduces end-diastolic volume of the ventricle
It increases end-diastolic volume of the left ventricle
It decreases end-systolic volume of the ventricle
It increases stroke volume
IncorrectQuestion 3
0 / 1 pts
It will lead to a compensatory hypertrophy
It will produce a smaller radius
It will produce a lower ventricular pressure
All of the above
IncorrectQuestion 4
0 / 1 pts
Aortic valve closes
Second heart sound is present
Ventricular pressure decreases
All of these
Question 5
1 / 1 pts
Carotid nerve
Glossopharyngeal nerve
Vagus nerve
Spinal accessory nerve
Which of these best describes the effect of an increased heart rate on the reduced ventricular
lling phase of the cardiac cycle?
According to the LaPlace law of a sphere, dilated cardiomyopathy which reduces the thickness
of the ventricular wall will have this effect on ventricular function;
During the isovolumetric ventricular relaxation, ______ occurs?
Information from the baroreceptors located in the aortic arch is carried to the brain stem by the;
3/7/24, 8:31 AM
Quiz: Cardiovascular Physiology: MSCI520: Principles of Physiology I (C01)
https://canvas.liberty.edu/courses/585957/quizzes/2858847
3/14
Question 6
1 / 1 pts
Increased HCO3- retention
Increased TPR
Increased K+ retention
Increased aquaporins in the collecting ducts of the kidneys
Question 7
1 / 1 pts
True
False
Question 8
1 / 1 pts
If the conduction of action potentials from the SA node to the rest of the heart is blocked because of disease
in the conducting pathways
Excessive vagal inhibition of SA node ring
Increased intrinsic ring of a latent pacemaker
Administration of epinephrine
Question 9
1 / 1 pts
An increase in the size of the inward current
An increase in dV/dT
An increase in action potential duration
An increase in the number of gap junctions
Question 10
1 / 1 pts
Which of these is not consistent with the effects of increased angiotensin II secretion?
Sympathetic stimulation of the SA node causes an increase in inward Ca++ current, a
decreased action potential threshold and an increased heart rate.
Which of these conditions is least likely to lead to a detectable ectopic focus on an EKG?
Which of these factors does not increase the conduction velocity in myocardial tissues?
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Quiz: Cardiovascular Physiology: MSCI520: Principles of Physiology I (C01)
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Decreased arterial pH
Decreased arterial PO2
Decrease venous PO2
Increased venous PCO2
Question 11
1 / 1 pts
Serotonin
Prostacyclin
Histamine
All of these
Question 12
1 / 1 pts
Decreased renal perfusion
Sympathetic stimulation
Increased renal Na+ reabsorption
β 1 agonists
Question 13
1 / 1 pts
P wave
PR Interval
QT interval
T wave
QRS Complex
The aortic bodies located along the aortic arch are most sensitive to which of the following
factors?
With regard to local blood ow regulation, which of these substances will produce
vasoconstriction?
Which of these is least likely to promote renin secretion by the juxtaglomerular cells?
Which of these relates to the conduction time through the AV node?
3/7/24, 8:31 AM
Quiz: Cardiovascular Physiology: MSCI520: Principles of Physiology I (C01)
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Question 14
1 / 1 pts
Are present on the cell membrane is skeletal muscles but on the SR membrane in cardiac muscles
Are voltage sensitive in skeletal muscles but are not in cardiac muscles
They serve to conduct extracellular calcium into the sarcoplasm of cardiac muscles unlike the in skeletal
muscles
All of these
Question 15
1 / 1 pts
Aortic stenosis produces a greater afterload than the exercise
Cardiac output is higher in aortic stenosis
Volume work is higher in aortic stenosis
This statement is not accurate
Question 16
1 / 1 pts
True
False
Question 17
1 / 1 pts
Atrial systole
Ejection
Rapid ventricular lling
Diastasis
The dihydropyridine receptors present in cardiac muscles are functionally different from those
in skeletal muscles in that they;
Myocardial oxygen consumption is generally higher in aortic stenosis than during strenuous
exercise because;
Propranolol, a non-selective beta-adrenergic antagonist can be used in treating a patient with a
tachyarrhythmia originating in the SA node.
The longest phase of the cardiac cycle is;
3/7/24, 8:31 AM
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Question 18
1 / 1 pts
Increasing muscle length increases the number of crossbridges between thick and thin laments
Increasing muscle length increases the Ca++ sensitivity of troponin C
Increasing muscle length increases Ca++ release from the SR
All are correct
IncorrectQuestion 19
0 / 1 pts
Increased ANP secretion
Increased renal vasoconstriction
Increased ADH secretion
Decreased heart rate
Question 20
1 / 1 pts
Parasympathetic stimulation of the ventricles has a negative ionotropic effect
An increase in heart rate produces an increase in contractility because there are more action potentials per
unit time, more total Ca 2+ entering the cell during the plateau phases, and more Ca 2+ for accumulation by
the sarcoplasmic reticulum
When an extrasystole occurs (an anomalous "extra" beat generated by a latent pacemaker), the tension
developed on the next beat is greater than normal
Cardiac glycosides which inhibit Na+ -K + ATPase at the extracellular K + -binding site make systolic heart
failure worse.
Question 21
1 / 1 pts
Systolic blood pressure
Which of these statements about tension development in cardiac muscles is accurate?
Which of these will you expect to nd in a patient with congestive cardiac failure and uid
overload?
Which of these statements about cardiac contractility is inaccurate?
Which of these do you suspect will be increased in a patient with aortic stenosis?
3/7/24, 8:31 AM
Quiz: Cardiovascular Physiology: MSCI520: Principles of Physiology I (C01)
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Pulse pressure
Left ventricular end-systolic volume
Mean arterial pressure
Question 22
1 / 1 pts
The mitral valve is open
Ventricles are relaxed
Third hear sound is present
All of these
Question 23
1 / 1 pts
The His-Purkinje system has a faster conduction velocity than the atrial system
The atria contain the same volume of blood as the ventricles
Gravity increases the ventricular conduction velocity
The rate of phase 4 depolarization is similar in all the conducting cells of the heart
Question 24
1 / 1 pts
True
False
Question 25
1 / 1 pts
Atria
Sinoatrial node
Which of these occurs during the rapid ventricular lling phase of the cardiac cycle?
Which of these accounts for the similarity between the P wave duration and the QRS complex
duration despite the ventricle being much larger than the atria?
In a patient that is losing blood rapidly, a decrease in blood volume results in a decrease in
cardiac output and right atrial pressure.
The action potential upstroke in this cell type results from the inward ow of Ca++ through
calcium channels;
3/7/24, 8:31 AM
Quiz: Cardiovascular Physiology: MSCI520: Principles of Physiology I (C01)
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Ventricles
All of these
Question 26
1 / 1 pts
Increased heart rate
Increased stroke volume
Increased venous dilation
Increased total peripheral resistance
Question 27
1 / 1 pts
True
False
Question 28
1 / 1 pts
The prolongation of ejection time delays closure of the pulmonic valve relative to the aortic valve
During expiration, the pulmonic valve closes earlier than the aortic valve
The dicrotic notch prevents back ow of blood into the heart
The aortic pressure is greater than the pulmonary pressure
Question 29
1 / 1 pts
P wave
PR Interval
QT interval
T wave
Which of these is not an effect of an increased sympathetic outow from the nucleus tractus
solitarus?
The administration of a drug that decreases venous compliance will lead to an increase in
stressed blood volume and mean systemic pressure.
The physiologic splitting of the second heart sound during inspiration results from;
Which of these represents repolarization of the ventricles?
3/7/24, 8:31 AM
Quiz: Cardiovascular Physiology: MSCI520: Principles of Physiology I (C01)
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QRS Complex
Question 30
1 / 1 pts
True
False
IncorrectQuestion 31
0 / 1 pts
Increased rate of relaxation
Increased peak tension
Increased rate of tension development
Decreased rate of relaxation
IncorrectQuestion 32
0 / 1 pts
The velocity of shortening of left ventricular muscles is maximal when the pulmonary artery pressure is zero
In the steady state, cardiac output is equal to venous return
In strenuous exercise, cardiac output becomes equal to stroke volume
The preload of the right ventricle is the end-systolic volume of the right ventricle
Question 33
1 / 1 pts
Pulmonary vessels
Skin vessels
Cerebral vessels
Coronary vessels
Antidiuretic hormone can increase TPR and mean arterial blood pressure in patients with
dehydration.
Which of these is not consistent with the ionotropic effects of catecholamines on the heart?
Which of these statements is accurate?
Local blood ow regulation is most importantly inuenced by the sympathetic innervation in
the;
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Quiz: Cardiovascular Physiology: MSCI520: Principles of Physiology I (C01)
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Question 34
1 / 1 pts
Increased ventilation
Transient decrease in heart rate
Arteriolar vasoconstriction
All of these
Question 35
1 / 1 pts
P wave
PR Interval
QT interval
T wave
QRS Complex
Question 36
1 / 1 pts
Systolic blood pressure
Pulse pressure
Diastolic blood pressure
Mean arterial pressure
Question 37
1 / 1 pts
Purkinje bers
AV node
Purkinjebers
Which of these do you suspect will result from the activation of the carotid bodies?
Which of these represents depolarization of the ventricles?
The lowest arterial pressure measured during a cardiac cycle and the pressure in the arteries
during ventricular relaxation when no blood is being ejected from the left ventricle is the;
Which of these cells have a capacity for autorhythmicity that is usually suppressed in normal
physiology (latent pacemakers) ? ;
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Quiz: Cardiovascular Physiology: MSCI520: Principles of Physiology I (C01)
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All of these
Question 38
1 / 1 pts
Capillaries
Veins
Arteries
Arterioles
Question 39
1 / 1 pts
The activation of the myocardium must occur in the correct sequence and with the correct timing and delays.
The action potential must originate in the SA node.
The S wave must precede a Q wave
The SA nodal impulses must occur regularly at a rate of 60–100 impulses per minute.
Question 40
1 / 1 pts
0.16mmHg/ml per min
0.18mmHg/ml per min
0.2mmHg/ml per min
0.5mmHg/ml per min
IncorrectQuestion 41
0 / 1 pts
Liver failure
The largest volume of blood in the circulatory system is contained in the ______?
Which of these does not dene a normal sinus rhythm?
You are evaluating a patient with suspected acute renal failure, the blood ow in the right
kidney is 450ml/min, the right arterial pressure is 90mmHg and right arterial venous pressure is
20mmHg. What is the right renal vascular resistance in this patient?
These conditions promote edema formation by decreasing the capillary oncotic pressure
except;
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Quiz: Cardiovascular Physiology: MSCI520: Principles of Physiology I (C01)
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Protein-Energy Malnutrition
Heart Failure
Nephrotic syndrome
Question 42
1 / 1 pts
Anemia
Thrombi
Atherosclerosis
Polycythemia
Question 43
1 / 1 pts
True
False
IncorrectQuestion 44
0 / 1 pts
2
4
5
16
Question 45
1 / 1 pts
Increased rate of SA nodal phase 4 depolarization
Which of these conditions is least likely to promote turbulent blood ow?
Digoxin, exerts a positive ionotropic effect on the heart causing an increase in stroke volume
and a decrease in right atrial pressure.
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.
Which of these mechanisms accounts for the positive dromotropic effect of sympathetic
stimulation of the heart?
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Increased inward Ca++ current in the AV node
Decreased outward K+ current in the AV node
Prolonged phase 3 of the SA node
Question 46
1 / 1 pts
True
False
Question 47
1 / 1 pts
True
False
Question 48
1 / 1 pts
The patients have lower than normal angiotensin II levels
The baroreceptors are desensitized to blood pressure elevations
The hypertension causes an increase in venous return
All of these
IncorrectQuestion 49
0 / 1 pts
Increased venous return
Increased TPR and mean arterial pressure
Further decrease in cerebral blood ow
The administration of a drug that increases total peripheral resistance will result in a decrease
in venous return for a given right arterial pressure.
Activation of the SA nodal nicotinic (N2) receptors produces an inhibition of adenylyl cyclase
and a decreased rate of phase 4 depolarization.
In a patient with chronic systemic hypertension, the baroreceptor reex does not reduce the
blood pressure back to the normal range because;
In a patient with raised intracranial pressure and cerebral ischemia, which of these is a normal
response of the vascular system?
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Quiz: Cardiovascular Physiology: MSCI520: Principles of Physiology I (C01)
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All of these
IncorrectQuestion 50
0 / 1 pts
Children
Congestive heart failure
Mitral regurgitation
Aortic stenosis
Quiz Score: 40 out of 50
In which of these patients are you least likely to hear the third heart sound caused by volume
overload?
