A person's absorption of calcium varies based on:
a. vitamin A status.
b. protein intakes.
c. gender.
d. age or life stage.
e. body composition.
Question 2
Calcium in the body's fluids performs all of the following major roles except:
a. regulating the transport of ions across cell membranes.
b. helping maintain normal blood glucose.
c. participating in blood clotting.
d. facilitating muscle contraction.
e. activating cellular enzymes.