Parathyroid hormone (PTH) increases the
a. breakdown of bone.
b. reabsorption of calcium.
c. production of an enzyme that activates
vitamin D.
d. indirectly, helps intestines take up calcium
from food.
e. activities of all of these
E
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Which structure produces immune cells and is part of the lymphatic system?
What will be an ideal response?
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Answer the following statement true (T) or false (F)
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