Fetal Circulation Quiz
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Fetal Circulation Quiz

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@PerfectStatistics2519

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Questions and Answers

Which structure allows some blood to flow from the right atrium to the left atrium in fetal circulation?

  • Umbilical vein
  • Ductus venosus
  • Ductus arteriosus
  • Foramen ovale (correct)

    • What role does the placenta play in fetal circulation?

  • It is responsible for gas exchange between the mother and fetus. (correct)
  • It mixes fetal blood with maternal blood.
  • It pumps blood directly into the fetal aorta.
  • It is the only site for nutrient absorption in the fetus.

    • What happens to blood flow in the ductus arteriosus after birth?

  • It increases significantly to the lungs.
  • It diverts blood back to the umbilical vein.
  • It decreases as the vessel constricts. (correct)
  • It opens wider to accommodate more blood.

    • What is the primary function of the umbilical arteries in fetal circulation?

    <p>To return deoxygenated blood from the fetus to the placenta.</p> Signup and view all the answers

    What defines the circulation time of blood in the body?

    <p>The time it takes for blood to complete a cycle from the right ventricle to the lungs and back.</p> Signup and view all the answers

    What is the role of alveoli in the lungs?

    <p>To facilitate the exchange of oxygen and carbon dioxide</p> Signup and view all the answers

    What vein is formed by the union of the superior mesenteric vein and the splenic vein?

    <p>Portal vein</p> Signup and view all the answers

    Which structure is responsible for pumping oxygenated blood to the aorta?

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

    Where does the pulmonary circulation begin?

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

    Which veins return blood from the upper body to the heart?

    <p>Superior vena cava</p> Signup and view all the answers

    What process occurs in the hepatic portal circulation?

    <p>Blood from the digestive organs circulates through the liver</p> Signup and view all the answers

    What is unique about the pulmonary veins compared to other veins in the body?

    <p>They contain oxygenated blood</p> Signup and view all the answers

    What is the purpose of the liver in relation to the blood from the digestive organs?

    <p>To detoxify potential poisons</p> Signup and view all the answers

    Which structure in the vascular system is primarily responsible for the exchange of materials between blood and tissues?

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

    What feature of veins helps prevent the backflow of blood?

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

    What is the main purpose of anastomoses in the vascular system?

    <p>To provide alternate pathways</p> Signup and view all the answers

    Which of the following statements about capillaries is correct?

    <p>They have walls that are one cell thick.</p> Signup and view all the answers

    What regulates blood flow in capillaries?

    <p>Precapillary sphincters</p> Signup and view all the answers

    Which component in the blood helps maintain colloid osmotic pressure?

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

    Why does blood pressure decrease as it reaches the venous end of capillaries?

    <p>Blood is filtered into tissue fluid.</p> Signup and view all the answers

    What happens to excess tissue fluid that does not re-enter the capillaries?

    <p>It is recycled as plasma in lymph capillaries.</p> Signup and view all the answers

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