Question

the thyroid gland responds. the kidneys slow calcium absorption. the bones take up calcium. the blood calcium level rises. blood calcium homeostasis. the blood calcium level decreases. the parathyroid glands respond. the kidneys absorb calcium. the intestines take up calcium. the bones release calcium. according to the diagram, which four body systems are interacting to maintain blood calcium homeostasis? a endocrine, excretory, reproductive, muscular b respiratory, digestive, muscular, and skeletal c endocrine, digestive, excretory, skeletal d respiratory, immune, reproductive, and endocrine

Explanation:

The thyroid and parathyroid glands are part of the endocrine system. The kidneys are part of the excretory system, the intestines are part of the digestive system, and the bones are part of the skeletal system.

Answer:

C. Endocrine, Digestive, Excretory, Skeletal