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Disorders by imbalance of thyroid hormone

Disorders are due to excessive or reduced secretion of hormones and accordingly there can be hyperthyroidism or hypothyroidism. Enlargement of thyroid is called goiter it can be because of lack of iodine, tumor, hyperfunctions or hypofunctions of the gland.

  1. Hyperthyroidism (hypersecretion of thyroid hormone)

    1. Graves’ disease or exophthalmic goiter it isan autoimmune disorder in which thyroid receptors are activated. The thyroid is enlarged and secretes excessive amount of thyroid hormones.

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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.

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