Question

Which of these best describes a hormone?

A. A chain of amino acids secreted by a gland

B. A neurotransmitter with a specific target

C. A neurotransmitter carried in the blood

D. A chemical message secreted by a gland

Answer 1

option D

A chemical message secreted by a gland.

Explaination: A hormone is a chemical that is made by specialist cells, usually within an endocrine gland, and it is released into the bloodstream to send a message to another part of the body. It is often referred to as a 'chemical messenger'.