Regulation of Erythropoiesis in Physiology
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Questions and Answers

What is the main principle constituent of the hemoglobin molecule?

  • Vitamin B12
  • Thyroxine
  • Copper
  • Iron (correct)

Which substances are essential for normal formation of DNA and cell division during red blood cell maturation?

  • Proteins
  • Copper and cobalt
  • Iron
  • Vitamin B12 and folic acid (correct)

Which hormone increases erythropoietin secretion?

  • Glucocorticoids
  • Follic acid
  • Estrogen
  • Catecholamines (correct)

What stimulates erythropoiesis?

<p>Hypoxia (A)</p> Signup and view all the answers

What is the role of hepcidin in iron absorption?

<p>Inhibits ferroportin transporter (D)</p> Signup and view all the answers

What is the significance of vitamin B12 and folic acid in erythropoiesis?

<p>They are required for the maturation of red blood cells (B)</p> Signup and view all the answers

What is the main function of regulating the RBC count in the circulation?

<p>To ensure a sufficient number of RBCs for adequate oxygen transport (B)</p> Signup and view all the answers

What is the role of the liver in erythropoiesis?

<p>Storage of iron and vitamin B12 (C)</p> Signup and view all the answers

Which organ secretes the majority of erythropoietin hormone?

<p>Kidneys (C)</p> Signup and view all the answers

Why do deficiencies of either folate or B12 produce the same type of anemia?

<p>They both impair the maturation of red blood cells (C)</p> Signup and view all the answers

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