Respiratory System: Anatomy and Physiology Quiz
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Questions and Answers

What maintains the openness of the trachea?

  • Smooth muscle contractions
  • Alveolar cells
  • C-shaped rings of cartilage (correct)
  • Surfactant production
  • Which cells secrete surfactant in the lungs?

  • Type I alveolar cells
  • Macrophages
  • Goblet cells
  • Type II alveolar cells (correct)
  • What is the primary function of surfactant in the lungs?

  • Promote alveolar collapse
  • Secrete mucus
  • Aid in gas exchange efficiency (correct)
  • Increase surface tension in the alveoli
  • Which law explains how the total pressure of a gas mixture is the sum of the partial pressures of each gas in the mixture?

    <p>Dalton's Law</p> Signup and view all the answers

    What are the two types of cells that make up the alveoli?

    <p>Type I and Type II cells</p> Signup and view all the answers

    What is the primary function of bile salts in digestion?

    <p>Emulsify fats for better absorption</p> Signup and view all the answers

    Peristalsis is a voluntary process controlled by the brain.

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

    The low pH of the stomach helps activate pepsinogen into pepsin for protein digestion.

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

    The hepatic portal circulation carries nutrient-rich blood from the intestines to the liver.

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

    Surfactant in the lungs increases surface tension to prevent alveolar collapse.

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

    Dalton's law states that each gas in a mixture exerts pressure independently of the other gases present.

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

    Bohr effect describes how increased CO2 levels in the blood decrease hemoglobin's affinity for oxygen.

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

    Villi and microvilli in the small intestine increase surface area for absorption of nutrients.

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

    The long reflexes in digestion are initiated by stimuli within the GI tract itself.

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

    The primary function of cholecystokinin (CCK) is to stimulate the release of bile from the liver.

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

    HCl secretion in the stomach is regulated by gastrin, which stimulates acid production.

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

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