Question

date class
3)
the feedback loop for blood calcium homeostasis is shown.
according to the diagram, which four body systems are interacting to maintain blood calcium homeostasis?
a respiratory, digestive, muscular, skeletal
b respiratory, immune, reproductive, endocrine
c endocrine, excretory, integumentary, muscular
d endocrine, digestive, excretory, skeletal

Explanation:

To determine the four body systems interacting for blood calcium homeostasis, analyze the diagram:

• Endocrine: Thyroid and parathyroid glands (endocrine organs) respond.
• Digestive: Intestines take up calcium (digestive system function).
• Excretory: Kidneys absorb or slow calcium absorption (excretory system role).
• Skeletal: Bones take up or release calcium (skeletal system involvement).

Options A, B, and C include systems (respiratory, immune, integumentary, muscular) not directly involved here. Option D matches the identified systems.

Answer:

D. Endocrine, digestive, excretory, skeletal