Endocrine gland
The adrenal glands are located above the kidneys in humans and in front of the kidneys in other animals. The adrenal glands produce a variety of hormones including adrenaline and the steroids aldosterone and cortisol. It controls the behaviour during crisis and emotional situations. It stimulates the heart and its conducting tissues and metabolic processes.
Adrenergic cell groups
Adrenergic cell groups refers to collections of neurons in the central nervous system that stain for PNMT, the enzyme that converts norepinephrine to epinephrine (adrenaline). Thus, it is postulated that the neurotransmitter they produce may be epinephrine (adrenaline). Located in the medulla, they are named adrenergic cell group C1, adrenergic cell group C2, and adrenergic cell group C3.