How do high intakes of zinc affect copper absorption?
a. high zinc intake inhibits the synthesis of the protein metallothionein in the mucosal cells.
b. metallothionein binds zinc more tightly than it binds copper.
c. excess zinc int eh diet stimulates the production of a protein that binds copper
d. metallothionein binds copper, preventing it form being released into the blood.
Ans: d. metallothionein binds copper, preventing it form being released into the blood.
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