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WorksheetsCardiac Physiology
Total questions: 15
Worksheet time: 8mins
The heart lies in the left half of the thoracic cavity
True
False
Which of the following is the proper sequence of cardiac excitation?
SA node-AV node-atrial myocardium-bundle of
His-Purkinje fibers-ventricular myocardium
SA node-atrial myocardium-AV node-bundle of
His-ventricular myocardium-Purkinje fibers
SA node-atrial myocardium-ventricular myocardium-AV node-bundle of His-Purkinje fibers
SA node-atrial myocardium-AV node-bundle of
His-Purkinje fibers-ventricular myocardium
Sympathetic stimulation of the heart
increases the heart rate
increases the contractility of the heart muscle
shifts the Frank–Starling curve to the left
Both a and b
All of the above
It received O2 poor blood from the venae cavae
Left atrium
Right Atrium
Left ventricle
Right ventricle
Pumps O2 rich blood into the aorta
Left atrium
Right Atrium
Left ventricle
Right ventricle
pumps O2-poor blood
into the pulmonary artery
Left atrium
Right Atrium
Left ventricle
Right ventricle
receives O2-rich blood
from the pulmonary veins
Left atrium
Right Atrium
Left ventricle
Right ventricle
prevents backflow of blood from the ventricles to the atria
AV valves
Semilunar valves
prevents backflow of
blood from the arteries
into the ventricles
AV valves
Semilunar valves
The first heart sound is associated with the closing of
the _______(AV/semilunar) valves and signals the onset of ____________(systole/
diastole), whereas the second heart sound is associated with
closing of the _________(AV/semilunar) valves and signals the onset of
_____________(systole/diastole).
(a)
The link that coordinates coronary blood flow with myocardial oxygen need
Acetylcholine
Adenosine
Epinephrine
Nor epinephrine
According to the Frank-Starling law of the heart, the strength
of ventricular contraction is
directly proportional to the end-diastolic volume.
inversely proportional to the end-diastolic volume.
independent of the end-diastolic volume.
In the absence of compensations, the stroke volume will decrease when
blood volume increases
venous return increases.
contractility increases.
arterial blood pressure increases.
Blood flow in the coronary circulation
increases during systole.
increases during diastole.
remains constant throughout the cardiac cycle.
The volume of blood pumped per minute by the left ventricle is
greater than the volume pumped by the right ventricle.
less than the volume pumped by the right ventricle.
the same as the volume pumped by the right ventricle.
either less or greater than the volume pumped by the right
ventricle, depending on the strength of contraction.
