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Author Question: Select the form of hemoglobin that contains iron in the ferric rather than the ferrous state. a. ... (Read 54 times)

lunatika

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on: Jun 25, 2018
Select the form of hemoglobin that contains iron in the ferric rather than the ferrous state.
 
  a. Myoglobin
  b. Methemoglobin
  c. Deoxyhemoglobin
  d. Carboxyhemoglobin

Question 2

Which of the following is true of hemoglobin if the oxygen dissociation curve shifts to the left?
 
  a. Has a lower affinity for oxygen
  b. Picks up less oxygen in the lungs but delivers more to tissues
  c. Picks up more oxygen in the lungs but delivers less to tissues
  d. Picks up and delivers more oxygen


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Viet Thy

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

ANS: B
Methemoglobin contains iron in the ferric form. This is nonfunctional hemoglobin (i.e., it cannot bind and carry oxygen).

Answer to Question 2

ANS: C
When the oxygen dissociation curve shifts to the left, it will load oxygen more easily in the lungs but also will hold onto it more tightly in tissue, thus delivering less oxygen to tissue. This is an example of high oxygen affinity.


lunatika

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

cpetit11

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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