Answer: endocrine
Explanation:
Hormones are chemical substances synthesized in minute quantities by an endocrine gland and carried by the blood to another tissue where it acts as a messenger to regulate the function of the target cell or tissues. A good example of endocrine action is Parathormone, synthesized in the neck but target the bones by controlling their calcium content.
Thus, the teaching was effective once the students recognize the local action of hormones as endocrine
