What feature distinguishes all hormones from neurotransmitters?

A. Hormones travel via the blood to a target tissue, while neurotransmitters cross the synaptic cleft to a postsynaptic cell.
B. Hormones require large concentrations to have an effect, while neurotransmitters require only low concentrations.
C. Hormones are steroids, while neurotransmitters are amino acids.
D. A hormone affects reproductive functions, while neurotransmitters control all other processes.


Answer: A

Biology & Microbiology

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