Adrenal medulla secretes norepinephrine following stimulation from the:.a) brainstem. b) diencephalon. c) hypothalamus. d) pituitary gland.

hypothalamus

Explanation:

hypothalamus is a portion of the brain, it contains a small number of nuclei and has many functions.

Hypothalamus is to link the nervous system, to the endocrine system through the pituitary gland to synthesize various hormones.

medulla is located in the inner part of the adrenal gland and secrete epinephrine and non epinephrine hormone that are triggered by physical and mental stress.

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.