Human Heart and Cardiovascular System
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Human Heart and Cardiovascular System

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@ModernComposite

Questions and Answers

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?

<p>Epicardium</p> Signup and view all the answers

What separates the right atrium from the right ventricle?

<p>Interatrial septum</p> Signup and view all the answers

Which vessel carries deoxygenated blood away from the heart?

<p>Pulmonary artery</p> Signup and view all the answers

Which cardiac sound is indicative of failure of the left ventricle?

<p>S4</p> Signup and view all the answers

What is the normal stroke volume for a 150 lbs. individual?

<p>70 ml</p> Signup and view all the answers

Which nerve releases acetylcholine to decrease heart rate?

<p>Vagus nerve</p> Signup and view all the answers

What does the limbic system influence in relation to heart rate?

<p>Emotion</p> Signup and view all the answers

In cardiac physiology, what is the formula for cardiac output?

<p>$CO = SV \times HR$</p> Signup and view all the answers

At peak performance, elite athletes might have how many times their normal cardiac output?

<p>7-8 times</p> Signup and view all the answers

What is the function of the semilunar valves in the heart?

<p>Prevent backflow from arteries back into ventricles</p> Signup and view all the answers

Where are the papillary muscles located in the heart?

<p>In the ventricles contracting to prevent backflow</p> Signup and view all the answers

Which chamber of the heart is responsible for ejecting blood into the systemic circuit?

<p>Left ventricle</p> Signup and view all the answers

What is the role of the SA node in the heart's electrical conduction system?

<p>Establishes cardiac rhythm</p> Signup and view all the answers

Which element is NOT involved in causing the action potential (electrical current) in cardiac muscle cells?

<p>Mg</p> Signup and view all the answers

What causes the P wave in an electrocardiogram (EKG)?

<p>Depolarization of the atria</p> Signup and view all the answers

When do you hear the 'Dub' sound during auscultation of the heart?

<p>At the start of diastole</p> Signup and view all the answers

What is the purpose of using an electrocardiogram (EKG) for diagnosing cardiac problems?

<p>To monitor electrical activity of the heart</p> Signup and view all the answers

What event occurs during ventricular ejection stage of the cardiac cycle?

<p>Blood is pushed into the aorta and pulmonary arteries</p> Signup and view all the answers

What is stroke volume referring to in relation to cardiac function?

<p>Amount of blood that left the heart per beat</p> Signup and view all the answers

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