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Author Question: Which of the following causes a shift to the right on the oxygen dissociation curve? a. Severe ... (Read 101 times)

charchew

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on: Jun 25, 2018
Which of the following causes a shift to the right on the oxygen dissociation curve?
 
  a. Severe anemia
  b. Alkalosis
  c. High levels of Hb F
  d. Decreased levels of 2,3-biphosphoglycerate (2,3-BPG)

Question 2

How many molecules of oxygen can one molecule of hemoglobin carry?
 
  a. One
  b. Two
  c. Three
  d. Four


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bitingbit

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Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: A
Severe anemia causes a right shift of the oxygen dissociation curve. This means that the affinity of hemoglobin for oxygen is less, so more oxygen will be released to tissue (more effective delivery of oxygen). Alkalosis (increased pH), Hb F, and decreased levels of 2,3-BPG all shift the curve to the left.

Answer to Question 2

ANS: D
Each heme group is capable of carrying one molecule of oxygen. Because four heme groups exist in one molecule of hemoglobin, each hemoglobin molecule can carry four molecules of oxygen.


charchew

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Reply 2 on: Jun 25, 2018
Thanks for the timely response, appreciate it

Mochi

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Reply 3 on: Yesterday
Excellent

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