Which of the following statements regarding calcium homeostasis is true?

A. When blood calcium levels are too low, osteoclast activity increases.
B. Parathyroid hormone increases calcium loss from the kidney.
C. Increased osteoblast activity increases blood calcium levels.
D. Calcitonin elevates blood calcium levels.
E. Parathyroid hormone inhibits osteoclast activity.


Answer: A. When blood calcium levels are too low, osteoclast activity increases.

Anatomy & Physiology

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