22 Questions
Which structure in the heart acts as the pacemaker?
SA node
Where is the SA node located?
Wall of the right atrium
During which phase of the cardiac cycle does muscle contraction occur?
Systole
Which heart sound is produced when the mitral valve closes?
First sound (lub)
What does stroke volume measure?
Amount of blood ejected from the left ventricle during one contraction
In what order does a drop of blood pass through the following types of blood vessels, starting from the aortic valve in the left ventricle, ending in the right atrium?
Aorta, large to small elastic arteries, large to small muscular arteries, arterioles, capillaries, venules, small to large veins, vena cava, right atrium
Is the coronary artery a muscular or elastic artery?
Elastic artery
Which two bypass structures allow most of the blood to bypass the pulmonary circulation in a fetus?
Foramen ovale and ductus arteriosus
What is the difference between heart rate and pulse?
Heart rate measures the number of ventricular contractions in 1 minute, while pulse measures the rate of alternating stretching and recoiling of an elastic artery wall as blood passes through it over 1 minute
During which phase of the cardiac cycle does muscle relaxation occur?
Diastole
Which heart sound is produced when the aortic valve closes?
The second sound (dub)
Which diagnostic tool is used to evaluate the size, shape, and movement of the heart?
ECHO
What does an ECG detect?
Electrical activity in the heart
Which diagnostic tool is used to evaluate the cardiac conduction system?
ECG
What does an ECG detect?
Electrical activity in the heart
What is the difference between an ECG and an ECHO?
ECG detects the electrical activity in the heart, while an ECHO evaluates the size, shape, and movement of the heart
Which part of the heart pacemaker is responsible for initiating the electrical impulses?
SA node
Which four conductors make up the rapid conduction system for an impulse created by the heart pacemaker?
SA node, AV node, Bundle of his, and Purkunji fiber system
Which part of the heart pacemaker is responsible for delaying the electrical impulses before they are transmitted to the ventricles?
AV node
What generates an impulse in the cardiac cycle that results in muscle contraction?
D. Depolarization
Which part of the heart is responsible for producing systolic blood pressure?
Left ventricle
What systolic blood pressure measure?
It measures the pressure produced in the arteries by the blood ejected from the left ventricle during systole
Test your knowledge of the pacemaker of the heart and its role in the cardiac cycle with this quiz. Learn about the location of the SA node and the four conductors of the rapid conduction system. Discover the working phase of the cardiac cycle and how it generates impulses for muscle contraction.
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