NEET (NTA)-National Eligibility cum Entrance Test (Medical) Biology Human Physiology-Neural Control and Coordination Revision (Page 6 of 17)

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Hormones of Adrenal or Suprarenal glands (Also called glands of emergency)

Location; they are paired structures located superior to the kidneys hence called suprarenal.

Structure; the gland consists of an outer cortex and an inner medulla. The cortex is surrounded by a fibrous capsule.

Image showing the Structure of Adernal Glands

Image Showing the Structure of Adernal Glands

The Structure of Adernal Glands

Adrenal cortex;

Origin; is derived from the mesoderm of the embryo.

It shows three distinct layers and they secrete three types of hormones. All hormones are steroids.

  1. Zona glomerulosa secret

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Disorders of Adrenal cortex

  • Addison’s disease is caused by deficiency of mineralocorticoids and glucocorticoids due to slow destruction of adrenal cortex. This may be caused by autoimmune disorder, tuberculosis or carcinoma.

    • There is low blood sugar.

    • Low plasma Na+ and Cl- ions leading to decreased ECF volume.

    • Increased urinary excretion of Na+ and Cl- ions.

    • Nausea, vomiting, diarrhea and a bronze like pigmentation of skin.

  • Cushing syndrome (syndrome is a group of sign and symptoms that occur

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