<span>a. chemicals produced by neurons that function as hormones—neurohormones
b. chemicals that act locally on nearby cells—paracrine factors
c. chemicals secreted by presynaptic terminal—neurotransmiters
d. influences same cell type from which it is secreted—autocrine agent
e. chemical secreted into the blood by specialized cells; travels some distance to target tissues—endocrine hormones</span>
Answer:
it helps come up with a conclusions for variety of hypothesis that are created when studying environmental science. the scientific method is a way to test a hypothesis
its when waste water is used to treat plants like a <em>water source </em>
