It is the darker, outer zone of the adrenal or suprarenal glands in mammals that is responsible for the secretion of the cortical hormones.
Cortical hormones fall under the following three categories:
Mineralocorticoids are released from the zona glomerulosa.
Glucocorticoids are released from the zona fasciculata.
Androgens are released from the zona reticularis.
Functions of cortical hormones:
Mineralocorticoids:
These are important for the concentration and balance of water and sodium ions in the blood.
An example of mineralocorticoids is aldosterone.
Glucocorticoids:
These are a stress-responsive class of hormones.
They are responsible for an immediate rise in gluconeogenesis, a rise in blood glucose levels, and the release of energy to face a stressful situation.
An example includes cortisone.
Androgens:
They affect the gonads by inducing secondary sexual characteristics during puberty.