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Question 18M.3.SL.TZ1.17b

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Date May 2018 Marks available [Maximum mark: 3] Reference code 18M.3.SL.TZ1.17b
Level SL Paper 3 Time zone TZ1
Command term Outline Question number b Adapted from N/A
b.
[Maximum mark: 3]
18M.3.SL.TZ1.17b
(b)

Outline how the liver recycles the components of red blood cells.

[3]

Markscheme

a. Kupffer cells engulf ruptured red blood cells by phagocytosis 

b. hemoglobin is broken down into component molecules 

c. some iron (from hemoglobin) transported to bone marrow/stored in liver 

d. protein component of hemoglobin converted to amino acids 

e. rest of heme component forms bile pigments

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