Cardiovascular System and Blood Oxygenation

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Questions and Answers

Which of the following scenarios would most critically compromise the oxygenation of blood in the left ventricle (LV)?

  • Insufficient function of the bicuspid/mitral valve. (correct)
  • Regurgitation (backflow) through the tricuspid valve.
  • Stenosis (narrowing) of the pulmonary valve.
  • A blockage in the anterior vena cava.

If a thrombus (blood clot) were to form in the pulmonary vein, which chamber of the heart would be directly affected by a backup of blood?

  • Right Ventricle (RV)
  • Left Atrium (LA) (correct)
  • Left Ventricle (LV)
  • Right Atrium (RA)

A patient is diagnosed with aortic valve insufficiency, causing blood to flow back into the left ventricle during diastole. Which of the following compensatory mechanisms is most likely to occur over time?

  • Hypertrophy (enlargement) of the left ventricle to maintain stroke volume. (correct)
  • Decreased atrial pressure in the right atrium to reduce preload.
  • Increased contractility of the right ventricle to overcome the pressure gradient.
  • Dilation of the pulmonary artery to reduce pulmonary blood flow.

A surgeon is performing a heart transplant and needs to ensure proper connection of the great vessels. Which of the following connections is critical for maintaining systemic oxygenation?

<p>Connecting the aorta to the left ventricle. (A)</p> Signup and view all the answers

If the tricuspid valve is damaged, leading to significant regurgitation, how would this directly affect pressure and volume in the right atrium (RA)?

<p>Increased pressure and increased volume in the RA. (B)</p> Signup and view all the answers

If the mitral valve were partially blocked, impeding blood flow, which of the following would directly experience increased pressure?

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

Why is the oxygenated blood carried from the lungs directly into the left atrium instead of directly into the left ventricle?

<p>To facilitate atrial contraction which optimizes ventricular filling. (C)</p> Signup and view all the answers

A patient is diagnosed with pulmonary valve stenosis (narrowing). Which of the following compensatory mechanisms is most likely to occur in the right side of the heart over time?

<p>Hypertrophy of the right ventricle (C)</p> Signup and view all the answers

Which of the following correctly traces a drop of blood through the systemic and pulmonary circuits?

<p>Right Atrium → Tricuspid Valve → Right Ventricle → Pulmonary Valve → Lungs → Pulmonary Vein → Left Atrium → Mitral Valve → Left Ventricle → Aortic Valve → Body (A)</p> Signup and view all the answers

If a thrombus (blood clot) formed in the inferior vena cava, which chamber of the heart would it enter first?

<p>Right Atrium (D)</p> Signup and view all the answers

Flashcards

Aorta

The largest artery in the body, carrying oxygenated blood from the left ventricle to the rest of the body.

Pulmonary Artery

Vessel carrying deoxygenated blood from the right ventricle to the lungs.

Bicuspid/Mitral Valve

Valve between the left atrium and left ventricle; prevents backflow of blood.

Right Atrium

Receives deoxygenated blood from the body via the vena cava.

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Right Ventricle

Pumps deoxygenated blood to the pulmonary artery.

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Tricuspid Valve

Valve between the Right Atrium and Right Ventricle preventing backflow.

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Left Atrium

Receives oxygenated blood from the pulmonary veins.

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Left Ventricle

Pumps oxygenated blood through the aortic valve to the aorta and to the rest of the body.

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