L9 Transport of CO2
23 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 total amount of carbon dioxide transported in 100 ml of arterial blood under normal resting conditions?

  • 42 ml
  • 48 ml (correct)
  • 45 ml
  • 3 ml

    • What is the main mechanism by which carbon dioxide is transported in the blood?

  • Bicarbonate (correct)
  • Carbamino compound
  • Physical solution
  • Carbonic anhydrase

    • What is the Cl- shift phenomenon?

  • The transport of CO2 as carbamino compounds
  • The exchange of Cl- and HCO3- ions between the red blood cells and plasma (correct)
  • The dissociation of CO2 from hemoglobin
  • The buffering of CO2 by hemoglobin

    • How does the Bohr effect differ from the Haldane effect?

    <p>The Bohr effect describes the effect of pH on the oxygen-hemoglobin dissociation curve, while the Haldane effect describes the effect of CO2 on the oxygen-hemoglobin dissociation curve.</p> Signup and view all the answers

    What is the main function of carbonic anhydrase in the transport of CO2?

    <p>To catalyze the conversion of CO2 to bicarbonate</p> Signup and view all the answers

    What percentage of the tidal CO2 is transported as carbamino compounds?

    <p>25%</p> Signup and view all the answers

    What is the purpose of the Haldane effect in the transport of CO2?

    <p>To facilitate the dissociation of CO2 from hemoglobin in the lungs</p> Signup and view all the answers

    What is the main reason for the decrease in pH from 7.4 to 7.34 due to the transport of tidal CO2?

    <p>The dissolution of CO2 in the physical solution</p> Signup and view all the answers

    What happens to HCO3- as CO2 enters a red blood cell?

    <p>It dissociates into water and CO2</p> Signup and view all the answers

    What is the main reason for the significant difference in chloride content between venous and arterial blood in red cells?

    <p>Chloride shift during CO2 transport</p> Signup and view all the answers

    What is the relationship between CO2 tension (PCO2) and the total CO2 content of blood according to the CO2 dissociation curve?

    <p>Direct relationship</p> Signup and view all the answers

    What is the effect of the HalDane effect at the lung with respect to CO2 content?

    <p>Decreases CO2 content in blood</p> Signup and view all the answers

    At the tissues, what happens to CO2 content when PO2 is 40mmHg and PCO2 is 46mmHg?

    <p>CO2 content increases to 52ml/dl</p> Signup and view all the answers

    What happens to Cl- as CO2 moves from RBCs into the plasma at the lung?

    <p>It moves out of RBCs into the plasma</p> Signup and view all the answers

    What is the effect on CO2 content in the absence of PO2 change according to the text?

    <p>CO2 content decreases</p> Signup and view all the answers

    How does carbonic acid dissociate at the lungs?

    <p>Into water and CO2</p> Signup and view all the answers

    What happens to the PO2 upon entering the lungs?

    <p>It rises</p> Signup and view all the answers

    What is the consequence of the shift of the CO2 dissociation curve down?

    <p>Additional loss of CO2</p> Signup and view all the answers

    Which type of hypoxia is due to decreased oxygen in the inspired air?

    <p>Hypoxic Hypoxia</p> Signup and view all the answers

    What does the Bohr effect involve?

    <p>Increase in CO2 and H+ levels</p> Signup and view all the answers

    What is cyanosis?

    <p>Bluish discoloration due to hypoxemia</p> Signup and view all the answers

    Which condition is characterized by tissues being unable to use oxygen?

    <p>Histotoxic Hypoxia</p> Signup and view all the answers

    Where does cyanosis typically manifest in the body?

    <p>Lips, fingers (nail bed), ear lobes and tip of nose</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser