Question

question 31
__ are unloaded into the synapse by neurons, whereas __ are secreted into the bloodstream by endocrine glands.
\tend - and - befriend\ chemicals; \fight - or - flight\ chemicals
\fight - or - flight\ chemicals; \tend - and - befriend\ chemicals
hormones; neurotransmitters
neurotransmitters; hormones

Explanation:

Neurotransmitters are released by neurons into the synapse for neural - to - neural communication. Hormones are secreted by endocrine glands directly into the bloodstream to affect distant target cells.

Answer:

D. Neurotransmitters; hormones