1.

Name the layers of adrenal cortex and mention their secretions?

Answer»

A pair of adrenal glands are located at the anterior end of the kidneys. Elence, they are called suprarenal glands.The outer region is called cortex and the inner region is medulla. 

The adrenal cortex has three distinct zones:

1. Zona Glomerulosa 

2. Zona fasciculata 

3. Zona reticularis

1. Zona Glomerulosa: 

  • It is the outer thin layer. It constitutes about 15% of the cortex. 
  • It secretes mineralocorticoids.

2. Zona fasciculata:

  • It is the middle wide layer constituting about 15% of adrenal cortex.
  • It secretes glucocorticoids such as cortisol, corticosterone and trace amounts of adrenal androgen and oestrogen.

3. Zona reticularis:

  • It is the inner zone of adrenal cortex.
  • It constitutes about 10% of adrenal cortex.
  • It constitutes about 10% of adrenal cortex.
  • It secretes the adrenal androgen, trace amount of oestrogen and glucocorticoids.


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