Answer
There are three ways by which an endocrine gland can be stimulated:
1. By another hormone: Hypothalamus secretes hormones that stimulate the anterior portion of the pituitary gland.
2. By changes in composition of bodily fluids, like blood: An increase of sugar in the blood causes the pituitary gland to release insulin.
3. By instruction from nervous system; The nervous system directly instructs the adrenal medulla to release epinephrine and norepinephrine in dangerous situations.
Work Step by Step
Same as above.
