Personal BIO Practice Worksheet
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Questions and Answers

What is the primary function of the thin wall of the heart?

  • Separates the left atrium from the left ventricle preventing blood from flowing backwards
  • Easy expansion to accommodate blood coming from the lungs (correct)
  • Bring oxygen rich blood form the lungs back to the heart
  • For decoration

What is the primary function of the four pulmonary veins?

  • Have heavier thicker walls and smaller lumens
  • Bring back oxygen rich blood from the lungs back to the heart (correct)
  • Carry oxygen rich blood AWAY from the heart
  • They are known as the natural pacemaker

What is the primary function of the mitral valve?

  • Prevent backflow of blood from the left ventricle into the left atrium (correct)
  • Regulate blood flow from the right ventricle into the right atrium
  • Promote backflow of blood from the left ventricle
  • Control blood flow from the aorta into the left ventricle

What are two prime functions of the left atrium?

<p>Contracts to push blood through the mitral valve into the left ventricle (A)</p> Signup and view all the answers

Which of the following statements about the pulmonary veins is true?

<p>They have thinner walls and larger lumens compared to the arteries (C)</p> Signup and view all the answers

Which of the following is a feature of the arteries?

<p>All of the above (D)</p> Signup and view all the answers

Which of the following is a feature of veins?

<p>Have heavier, thicker walls and smaller lumens (D)</p> Signup and view all the answers

What is the primary function of the semi-lunar valve?

<p>Prevent backflow from pulmonary artery into right ventricle (C)</p> Signup and view all the answers

Which of the following is not a component of the circulatory system?

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

What is the function of the pulmonary circulation?

<p>Carry blood to and from the lungs (B)</p> Signup and view all the answers

Which of the following is a component of the systemic circulation?

<p>Delivers oxygen and nutrients to body tissues (D)</p> Signup and view all the answers

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