Which of the following statements are correct? i) hormones often regulate homeostasis through antagonistic functions. ii) hormones of the same chemical class usually have the same function. iii) hormones are secreted by specialized cells usually located in exocrine glands. iv) hormones are often regulated through feedback loops.

III) Hormones are secreted by specialized cells usually located in exocrine glands

Explanation:

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme