22 Questions
Which chamber of the heart receives blood from the body?
Right atrium
Where is the pericardium located in relation to the heart?
Surrounds the heart
Which statement about the pulmonary circuit is correct?
Lets blood get oxygen
Which layer of the heart is also the outermost layer of the heart?
Epicardium
What separates the right atrium from the right ventricle?
Interatrial septum
Which vessel carries deoxygenated blood away from the heart?
Pulmonary artery
Which cardiac sound is indicative of failure of the left ventricle?
S4
What is the normal stroke volume for a 150 lbs. individual?
70 ml
Which nerve releases acetylcholine to decrease heart rate?
Vagus nerve
What does the limbic system influence in relation to heart rate?
Emotion
In cardiac physiology, what is the formula for cardiac output?
$CO = SV \times HR$
At peak performance, elite athletes might have how many times their normal cardiac output?
7-8 times
What is the function of the semilunar valves in the heart?
Prevent backflow from arteries back into ventricles
Where are the papillary muscles located in the heart?
In the ventricles contracting to prevent backflow
Which chamber of the heart is responsible for ejecting blood into the systemic circuit?
Left ventricle
What is the role of the SA node in the heart's electrical conduction system?
Establishes cardiac rhythm
Which element is NOT involved in causing the action potential (electrical current) in cardiac muscle cells?
Mg
What causes the P wave in an electrocardiogram (EKG)?
Depolarization of the atria
When do you hear the 'Dub' sound during auscultation of the heart?
At the start of diastole
What is the purpose of using an electrocardiogram (EKG) for diagnosing cardiac problems?
To monitor electrical activity of the heart
What event occurs during ventricular ejection stage of the cardiac cycle?
Blood is pushed into the aorta and pulmonary arteries
What is stroke volume referring to in relation to cardiac function?
Amount of blood that left the heart per beat
Test your knowledge on the human heart, its structure, function, and the circulatory system. Learn about the location of the heart, its size, and how it functions as a pump to circulate blood throughout the body.
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