Bicarbonate and CO2 Transport
48 Questions
5 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 happens to H+ ions in red blood cells (RBCs) during the process of CO2 transport?

  • They bind with haemoglobin (correct)
  • They convert into carbonic acid
  • They leave the RBCs freely
  • They combine with bicarbonate
  • Which enzyme catalyses the conversion of CO2 into carbonic acid?

  • Bicarbonate
  • Chloride
  • Carbonic anhydrase (correct)
  • Haemoglobin
  • What is the role of chloride in the chloride shift?

  • To exchange with bicarbonate in RBCs
  • To catalyze the conversion of CO2
  • To maintain electroneutrality in RBCs (correct)
  • To convert CO2 into carbonic acid
  • What is the main form in which CO2 is transported in the body?

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

    What happens to carbonic acid at the lungs during the process of CO2 transport?

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

    What allows HCO3− to leave the red blood cells (RBCs) in exchange for chloride ions?

    <p>Carrier protein</p> Signup and view all the answers

    Which ion is bound by haemoglobin during the process of CO2 transport?

    <p>H+</p> Signup and view all the answers

    What is the product of the hydrolysis of carbonic acid in red blood cells (RBCs)?

    <p>HCO3− ions</p> Signup and view all the answers

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

    <p>To convert CO2 into carbonic acid</p> Signup and view all the answers

    True or false: The majority of CO2 is transported via chloride.

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

    True or false: CO2 diffuses out of tissues and into red blood cells (RBCs) down its concentration gradient.

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

    True or false: Carbonic acid is hydrolysed into H+ ions and HCO3– (bicarbonate) in red blood cells (RBCs).

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

    True or false: The H+ ion is bound by carbonic anhydrase during the process of CO2 transport.

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

    True or false: At the lungs, H+ dissociates from haemoglobin and combines with bicarbonate to form carbonic acid.

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

    True or false: The exchange of bicarbonate (HCO3−) and chloride (Cl−) across the membrane of red blood cells (RBCs) is known as the chloride shift.

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

    True or false: A carrier protein is utilized to allow HCO3− to leave the RBC in exchange for chloride ions.

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

    True or false: HCO3− ions can easily cross the cell membrane of red blood cells (RBCs).

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

    True or false: The chloride shift allows the RBC to maintain its electroneutrality.

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

    True or false: Carbonic anhydrase catalyzes the conversion of carbonic acid into CO2 and water.

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

    True or false: H+ ions dissociate from hemoglobin and combine with bicarbonate to form carbonic acid at the lungs.

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

    True or false: The chloride shift refers to the exchange of bicarbonate (HCO3−) and chloride (Cl−) across the membrane of white blood cells (WBCs).

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

    True or false: CO2 diffuses freely into red blood cells (RBCs) but HCO3– ions cannot easily cross the cell membrane.

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

    True or false: The majority of CO2 is transported via chloride.

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

    True or false: The role of chloride in the chloride shift is to maintain electroneutrality in red blood cells (RBCs).

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

    True or false: Carbonic acid is hydrolyzed into H+ ions and HCO3– (bicarbonate) in white blood cells (WBCs).

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

    True or false: HCO3− ions can easily cross the cell membrane of red blood cells (RBCs).

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

    True or false: The main form in which CO2 is transported in the body is bicarbonate.

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

    True or false: The majority of CO2 is transported via bicarbonate.

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

    True or false: Carbonic acid is then hydrolysed into H+ ions and HCO3– (bicarbonate).

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

    True or false: The reverse reaction at the lungs is catalyzed by carbonic anhydrase.

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

    True or false: The chloride shift refers to the exchange of bicarbonate (HCO3−) and chloride (Cl−) across the membrane of red blood cells (RBCs).

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

    True or false: The chloride shift allows the RBC to maintain its electroneutrality.

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

    True or false: HCO3− ions can easily cross the cell membrane of red blood cells (RBCs).

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

    True or false: Carbonic anhydrase catalyzes the conversion of CO2 into carbonic acid.

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

    True or false: The main form in which CO2 is transported in the body is chloride.

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

    True or false: H+ ions dissociate from hemoglobin and combine with bicarbonate to form carbonic acid at the lungs.

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

    True or false: The chloride shift refers to the exchange of bicarbonate (HCO3−) and chloride (Cl−) across the membrane of red blood cells (RBCs).

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

    True or false: The majority of CO2 is transported via bicarbonate.

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

    True or false: Carbonic anhydrase catalyzes the conversion of CO2 into carbonic acid.

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

    True or false: CO2 diffuses freely into red blood cells (RBCs) but HCO3– ions cannot easily cross the cell membrane.

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

    True or false: H+ ions dissociate from hemoglobin and combine with bicarbonate to form carbonic acid at the lungs.

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

    True or false: The H+ ion is bound by haemoglobin during the process of CO2 transport.

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

    True or false: The reverse reaction at the lungs is catalyzed by carbonic anhydrase.

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

    True or false: The role of chloride in the chloride shift is to maintain electroneutrality in red blood cells (RBCs).

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

    True or false: Carbonic acid is hydrolyzed into H+ ions and HCO3– (bicarbonate) in white blood cells (WBCs).

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

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

    <p>Carbonic anhydrase catalyzes the conversion of CO2 into carbonic acid.</p> Signup and view all the answers

    What allows HCO3− to leave the red blood cells (RBCs) in exchange for chloride ions?

    <p>A carrier protein allows HCO3− to leave the RBC in exchange for chloride ions.</p> Signup and view all the answers

    What happens to H+ ions in red blood cells (RBCs) during the process of CO2 transport?

    <p>The H+ ion is bound by haemoglobin during the process of CO2 transport.</p> Signup and view all the answers

    Study Notes

    CO2 Transportation

    • The majority of CO2 is transported via bicarbonate
    • CO2 diffuses down its concentration gradient out of tissues and into red blood cells (RBCs)

    Conversion of CO2 into Bicarbonate

    • Inside the RBC, the enzyme carbonic anhydrase catalyses the conversion of CO2 into carbonic acid (H2CO3)
    • Carbonic acid is then hydrolysed into H+ ions and HCO3– (bicarbonate)

    Role of Haemoglobin

    • The H+ ion is bound by haemoglobin, which buffers the process

    Reverse Process at the Lungs

    • At the lungs, H+ dissociates from haemoglobin and combines with bicarbonate to form carbonic acid
    • Carbonic acid is then converted back to CO2 and water, catalysed by carbonic anhydrase

    Chloride Shift

    • Chloride shift refers to the exchange of bicarbonate (HCO3−) and chloride (Cl−) across the membrane of red blood cells (RBCs)
    • CO2 diffuses freely into RBCs, but as HCO3– ions are charged, they cannot easily cross the cell membrane to leave the RBC
    • A carrier protein is utilised to allow HCO3− to leave the RBC in exchange for chloride ions, maintaining electroneutrality

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    Test your knowledge on the role of bicarbonate in CO2 transport and the enzymatic conversion of CO2 into carbonic acid. Explore how bicarbonate is hydrolyzed and the role of haemoglobin in buffering the process.

    More Like This

    CO2 Transport and Partial Pressure
    5 questions
    Carbon Dioxide Transport Mechanisms
    8 questions
    Carbon Dioxide Transport Mechanisms
    139 questions
    Use Quizgecko on...
    Browser
    Browser