Question

multiple choice question
the signal makers and senders of the endocrine system are called

vitamins
hormones
glands
neurotransmitters

Explanation:

The endocrine system consists of glands that produce and secrete hormones, which act as chemical messengers. Vitamins are nutrients, neurotransmitters are for the nervous - system communication. Glands are the organs, and hormones are the signals made and sent by the glands in the endocrine system.

Answer:

B. hormones