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Hormones secreted by adrenal medulla
Hormones secreted by adrenal medulla





hormones secreted by adrenal medulla

The chromaffin granules contain the hormones of the adrenal medulla, which include dopamine, norepinephrine, and epinephrine.

hormones secreted by adrenal medulla

The sympathetic nervous system and the adrenal medulla are collectively known as the sympathoadrenal system.

hormones secreted by adrenal medulla

Indeed, the adrenal medulla is an integral part of the sympathetic nervous system, a major subdivision of the autonomic nervous system ( see human nervous system). These cells migrate to the adrenal medulla from the embryonic neural crest and represent specialized neural tissue. The adrenal medulla is composed of chromaffin cells that are named for the granules within the cells that darken after exposure to chromium salts. It is small, making up only about 10 percent of the total adrenal weight. The adrenal medulla is embedded in the centre of the cortex of each adrenal gland. In some vertebrates the cells of the two parts are interspersed to varying degrees. The adrenal glands vary in size, shape, and nerve supply in other animal species. The two parts differ in embryological origin, structure, and function. Each gland consists of two parts: an inner medulla, which produces epinephrine and norepinephrine (adrenaline and noradrenaline), and an outer cortex, which produces steroid hormones. In humans each adrenal gland weighs about 5 grams (0.18 ounce) and measures about 30 mm (1.2 inches) wide, 50 mm (2 inches) long, and 10 mm (0.4 inch) thick.

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