Biology

The correct answer is: C.They are important for maintaining homeostasis and metabolic balance.

Explanation:

A.They act to inhibit all physiological functions: This is incorrect. Signals that regulate body systems do not generally inhibit all functions; instead, they help maintain balance by activating or inhibiting specific pathways as needed.

B.They only affect the immune system: This is incorrect. While signals do regulate immune responses, they also affect other systems such as the nervous, endocrine, and cardiovascular systems to maintain overall body function.

C.They are important for maintaining hom...