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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

Sagot :

Areaderidn

Answer:

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'.

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