Subscribe now to access pointwise, categorized & easy to understand notes on 272 key topics of NEET Biology covering entire 2017 syllabus. All the updates for one year are also included. View Features or .

Rs. 350.00 or

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. It is characterized by exophthalmia (protrusion of eye balls) because of accumulation of fluid and mucopolysaccharides behind them. Loss of weight on account of increased metabolism. There is slight rise… (285 more words) …

Subscribe & login to view complete study material.

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 secrets mineralocorticoids. As evident from the name they are responsible for the regulation of minerals in the body. Aldosterone is the most important mineralocorticoid.… (591 more words) …

Subscribe & login to view complete study material.

f Page
Sign In