Chemical Coordination and integration — BIOLOGY STD 11 Science — Question

2. Medulla of adrenal glands

Explanation:

The adrenal medulla is a part of the sympathetic nervous system. The sympathetic nervous system and the adrenal medulla are collectively known as the sympathoadrenal system. The chromaffin granules contain the hormones of the adrenal medulla, which include dopamine, norepinephrine, and epinephrine. When stimulated by sympathetic nerve impulses, the chromaffin granules are released from the cells and the hormones enter the circulation. Thus, the adrenal medulla is a neurohormonal organ.