Blood Composition and Clotting
38 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the approximate percentage of oxygen in the air that animals breathe?

  • 1%
  • 50%
  • 78%
  • 21% (correct)

    • What is the driving force for the diffusion of a gas?

  • The atmospheric pressure
  • The rate of diffusion
  • The solubility of the gas in water
  • The partial pressure of the gas (correct)

    • As altitude increases, what happens to the atmospheric pressure?

  • It remains constant
  • It increases
  • It becomes zero
  • It decreases (correct)

    • What is the partial pressure of oxygen in air at sea level?

    <p>160 mmHg</p> Signup and view all the answers

    Which of the following factors does not influence the solubility of a gas in water?

    <p>Color of the water</p> Signup and view all the answers

    What is the sum of the pressures exerted by each gas in the mixture of air?

    <p>Atmospheric pressure</p> Signup and view all the answers

    What is the approximate percentage of plasma in the total volume of blood?

    <p>50%</p> Signup and view all the answers

    Which type of blood cell is responsible for transporting oxygen in the body?

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

    What is the function of platelets in the blood clotting process?

    <p>To form a platelet plug and facilitate the formation of a fibrin-based clot</p> Signup and view all the answers

    What is unique about the erythrocytes of mammals compared to those of other vertebrates?

    <p>They lose their nuclei upon maturation</p> Signup and view all the answers

    What is the function of leukocytes in the body?

    <p>To protect and defend the body against infection</p> Signup and view all the answers

    Which of the following components of blood is responsible for carrying nutrients, ions, and waste products?

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

    What is the mathematical relationship between blood pressure, blood flow, and resistance?

    <p>Blood flow is directly proportional to the difference in pressure and inversely proportional to the resistance</p> Signup and view all the answers

    What is the effect of increasing the radius of arterioles on blood flow?

    <p>It increases blood flow by decreasing resistance</p> Signup and view all the answers

    What is the net effect of vasodilation on blood pressure?

    <p>It decreases blood pressure by decreasing resistance</p> Signup and view all the answers

    What is the relationship between cardiac output and blood pressure?

    <p>Cardiac output is directly proportional to blood pressure</p> Signup and view all the answers

    What are the two parameters that determine cardiac output?

    <p>Heart rate and stroke volume</p> Signup and view all the answers

    What is the effect of increased total peripheral resistance on blood pressure?

    <p>It increases blood pressure by increasing resistance to blood flow</p> Signup and view all the answers

    What is the primary function of ventilation in animals?

    <p>To bring oxygenated water or air into contact with the gas-exchange organ</p> Signup and view all the answers

    Which type of gas-exchange organ is characterized by a large surface area and thin, delicate structure?

    <p>Body surface</p> Signup and view all the answers

    What is the benefit of countercurrent exchange in gill ventilation?

    <p>To maximize oxygen diffusion into the blood</p> Signup and view all the answers

    Which type of animal has external gills?

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

    What is the role of the circulatory system in tracheal systems?

    <p>To play no role in gas exchange</p> Signup and view all the answers

    What is the relationship between pressure and volume according to Boyle's law?

    <p>Inversely proportional</p> Signup and view all the answers

    How do air-breathing vertebrates ventilate their lungs?

    <p>By negative pressure filling</p> Signup and view all the answers

    What is the function of spiracles in insects?

    <p>To facilitate gas exchange</p> Signup and view all the answers

    Which type of gas-exchange organ is found in amphibians?

    <p>Body surface</p> Signup and view all the answers

    What is the purpose of the lamellae in gill filaments?

    <p>To facilitate gas exchange</p> Signup and view all the answers

    What is the function of the upper respiratory structures in the mammalian respiratory system?

    <p>To warm, humidify, and filter the air</p> Signup and view all the answers

    What is the purpose of the pleural sac in the mammalian respiratory system?

    <p>To protect the lung tissue and facilitate movement of the lungs</p> Signup and view all the answers

    During inhalation, what happens to the volume and pressure of the lungs?

    <p>Volume increases, pressure decreases</p> Signup and view all the answers

    What is the primary function of surfactant in the mammalian respiratory system?

    <p>To decrease surface tension in the alveolar walls</p> Signup and view all the answers

    What is the average tidal volume for humans at rest?

    <p>0.5 L (500 mL)</p> Signup and view all the answers

    What is the difference between tidal ventilation and the unidirectional flow-through system of fishes?

    <p>Tidal ventilation is less efficient than the unidirectional flow-through system</p> Signup and view all the answers

    What is the purpose of the bronchioles in the mammalian respiratory system?

    <p>To regulate air flow through smooth muscle contraction</p> Signup and view all the answers

    What is the site of gas exchange in the mammalian respiratory system?

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

    What type of cells form the thin alveolar walls in the mammalian respiratory system?

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

    What is the direction of air flow during exhalation in tidal ventilation?

    <p>The same route as inhalation</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser