Biology Chapter 7: Gas Exchange and Myoglobin
18 Questions
2 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 CO2 that diffuses into the blood plasma?

  • 30%
  • 90%
  • 70% (correct)
  • 50%

    • What is the role of carbonic anhydrase in the process of CO2 transport?

  • It catalyzes the formation of carbonic acid (correct)
  • It catalyzes the formation of bicarbonate ions
  • It catalyzes the formation of oxygen
  • It catalyzes the formation of water

    • What is the effect of chloride ion movement on the charge in the erythrocyte?

  • It reverses the charge in the cell
  • It keeps the charge in the cell constant (correct)
  • It decreases the negative charge
  • It increases the positive charge

    • At what Po2 is hemoglobin (Hb) approximately 70% saturated with oxygen?

    <p>40 mmHg</p> Signup and view all the answers

    What is the characteristic of the oxygen dissociation curve for hemoglobin (Hb)?

    <p>It is S-shaped</p> Signup and view all the answers

    What happens to the oxygen saturation of Hb when Po2 decreases?

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

    What is the primary function of hemoglobin in the lungs?

    <p>To bind oxygen</p> Signup and view all the answers

    What is the result of the binding of oxygen to one subunit of hemoglobin?

    <p>The remaining subunits increase their affinity for oxygen</p> Signup and view all the answers

    What percentage of carbon dioxide is transported in the blood as dissolved CO2?

    <p>7%</p> Signup and view all the answers

    What is the name of the compound formed when carbon dioxide binds to the amino group of hemoglobin?

    <p>Carbamino-hemoglobin</p> Signup and view all the answers

    In what environment does hemoglobin show high affinity for oxygen?

    <p>In an environment with high oxygen partial pressure</p> Signup and view all the answers

    What is the primary function of carbamino-hemoglobin in the transport of carbon dioxide?

    <p>To transport carbon dioxide from the tissues to the lungs</p> Signup and view all the answers

    What is the difference between the O2 dissociation curve for fetal hemoglobin and the O2 dissociation curve for adult hemoglobin?

    <p>The O2 dissociation curve for fetal hemoglobin is situated to the left of the O2 dissociation curve for adult hemoglobin.</p> Signup and view all the answers

    What is the effect of increasing CO2 partial pressure on the pH of the blood at metabolically active tissues?

    <p>It decreases the pH, making the blood more acidic.</p> Signup and view all the answers

    What is the function of myoglobin in muscles?

    <p>To store O2 and release it when Po2 falls very low</p> Signup and view all the answers

    How does the O2 dissociation curve for myoglobin compare to the O2 dissociation curve for Hb?

    <p>It is situated to the left of the O2 dissociation curve for Hb</p> Signup and view all the answers

    What is the effect of CO2 partial pressure on the oxygen dissociation curve of Hb?

    <p>It shifts the curve to the right</p> Signup and view all the answers

    What is the advantage of fetal hemoglobin's higher affinity towards O2?

    <p>It ensures the fetus receives a supply of O2 from the mother's blood when Po2 is low in the uterus</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser