It is also known as stress combat hormone. It produces anti-inflammatory reactions and suppresses the immune response. Cortisol is a glucocorticoid invloved in maintaining cardio vascular and kidney functions. Glucocorticoids stimulate gluconeogenesis, lipolysis and proteolysis (the life saving avtivity). Both adrenalin and nor adrenalin are catecholamines. Adrenalin (epinephrine) and noradrenalin (nor epinephrine) are the two hormones secreted by the adrenal medulla. Zona reticularis, an inner zone of adrenal cortex constitute about 10% of adrenal cortex and secretes the adrenal androgen, trace amount of oestrogen and glucocorticoids.Īdrenal medulla: It is the central part of adrenal gland and is composed of ovoid and columnar cells, which are found around the network of blood capillaries. Zona fasciculata, the middle widest layer constitutes about 75% of adrenal cortex and secretes glucocorticoids such as cortisol layer constitutes about 75% of adrenal cortex and secretes glucocorticoids such as cortisol, corticosterone and trace amounts of adrenal androgen and oestrogen. Zona glomerulosa an outer thin layer constitutes about 15% of adrenal cortex, and secretes mineralocorticoids. Histologically the adrenal cortex has three distinct zones, zona glomerulosa, zona fasciculata and zona reticularis. Anatomically the outer region is the cortex and the inner region is the medulla. A pair of adrenal glands are located at the anterior end of the kidneys, hence also called suprarenal glands.
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