Human Heart and Cardiovascular System
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Questions and Answers

Which chamber of the heart receives blood from the body?

  • Left atrium
  • Right ventricle
  • Left ventricle
  • Right atrium (correct)

Where is the pericardium located in relation to the heart?

  • Superior to the apex of the heart
  • Inside the heart chambers
  • Between the lungs
  • Surrounds the heart (correct)

Which statement about the pulmonary circuit is correct?

  • Lets blood get oxygen (correct)
  • Sends blood with oxygen to the body
  • Is part of the systemic circuit
  • Carries deoxygenated blood back to the heart

Which layer of the heart is also the outermost layer of the heart?

<p>Epicardium (C)</p> Signup and view all the answers

What separates the right atrium from the right ventricle?

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

Which vessel carries deoxygenated blood away from the heart?

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

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

<p>S4 (B)</p> Signup and view all the answers

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

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

Which nerve releases acetylcholine to decrease heart rate?

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

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

<p>Emotion (C)</p> Signup and view all the answers

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

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

Where are the papillary muscles located in the heart?

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

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

<p>Left ventricle (A)</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 (C)</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 (A)</p> Signup and view all the answers

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

<p>Depolarization of the atria (B)</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 (D)</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 (B)</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 (B)</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 (D)</p> Signup and view all the answers

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