Download Answers for support worksheet – Option H

Cambridge Biology for the IB Diploma
Answers for support worksheet – Option H
1
a
carbohydrate – reserve of glucose as glycogen, maintains constant blood level
calciferol – vitamin D, prevents rickets in children
retinol – needed for normal vision
iron – used to manufacture red blood cells
b
(4)
The liver synthesizes plasma proteins (blood proteins). These help maintain the osmotic
potential of the blood (and have a variety of other functions).
The liver also synthesizes cholesterol, which is a component of cell membranes.
(2)
c
A = hepatic vein, B = hepatic artery, C = hepatic portal vein
(3)
d
i
Kupffer cells
(1)
ii
The heme group is split into iron and bile pigment; globins are converted to amino
acids and reused.
(3)
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