Hemoglobin Structure and Function

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson
Download our mobile app to listen on the go
Get App

Questions and Answers

Which element in the heme moiety of hemoglobin binds to oxygen?

  • Zinc
  • Magnesium
  • Iron (correct)
  • Copper

What is the molecular weight of hemoglobin?

  • 50,000
  • 64,450 (correct)
  • 75,825
  • 40,100

In normal adult human hemoglobin (hemoglobin A), how many pairs of polypeptides are there in each molecule?

  • 3
  • 4
  • 6
  • 2 (correct)

What causes a decrease in the affinity of hemoglobin for oxygen?

<p>An increase in the concentration of 2,3-BPG (B)</p> Signup and view all the answers

When blood is exposed to oxidizing agents, what change occurs to the iron in hemoglobin?

<p>It is converted to ferric iron (Fe3+) (D)</p> Signup and view all the answers

What happens when methemoglobin is present in large quantities in the circulation?

<p>Causes a dusky discoloration of the skin resembling cyanosis (A)</p> Signup and view all the answers

What enzyme system in red cells converts methemoglobin back to hemoglobin?

<p>NADH-methemoglobin reductase system (D)</p> Signup and view all the answers

What is the consequence of carbon monoxide reacting with hemoglobin?

<p>Forms carboxyhemoglobin which displaces O2 on hemoglobin (D)</p> Signup and view all the answers

Where is most of the biliverdin converted in humans and excreted?

<p>Converted to bilirubin and excreted in the bile (B)</p> Signup and view all the answers

For what condition can phototherapy be used effectively according to the text?

<p>Jaundice due to hemolysis in infants (B)</p> Signup and view all the answers

Flashcards are hidden until you start studying

More Like This

Use Quizgecko on...
Browser
Browser