Thyroid disorders, Biology

THYROID DISORDERS -

(A) Hyperthyroidism (Hypersecretion of thyroid hormone).

Graves' disease or Basedow's disease or Parry's disease or exophthalmic goitre. It is a thyroid enlargement (goitre) in which the thyroid secretes excessive amount of thyroid hormone.

It is characterised by exophthalmia (protrusion of eye balls because of fluid accumulation behind them), loss of weight, slightly rise in the body temperature, excitability, rapid heart beat, nervousness and restlessness.

(B) Hypothyroidism (Hyposecretion of thyroid hormone)

(a) Cretinism. This disorder is caused by deficiency of thyroid hormone in infants.

It's character - slow body growth and mental development of reduced metabolic rate.

Other symptoms of this disorder are - slow heart beat, lower blood pressure, decrease in temperature, stunted growth, pigeon chest and protruding tongue and retarded sexual development.

(b) Myxoedema or Gull's disease. It is caused by deficiency of thyroid hormone in adults.

This disease is characterized by puffy appearance due to accumulation of fat in the subcutaneous tissue because of low metabolic rate.

The patient lacks alertness, intelligence and initiative. He also suffers from slow heart beat, low body temperature and retarded sexual development.

(c) Simple Goitre. It is caused by deficiency of iodine in diet because iodine is needed for the synthesis of thyroid hormone. It causes thyroid enlargement. It may lead to cretinism or myxoedema. This disease is common in hilly areas. Addition of iodine to the table salt prevents this disease.

(d) Hashimoto's disease. In this disease all the aspects of thyroid function are impaired. It is an autoimmune disease in which the thyroid gland is destroyed by autoimmunity.

Posted Date: 10/2/2012 6:48:00 AM | Location : United States







Related Discussions:- Thyroid disorders, Assignment Help, Ask Question on Thyroid disorders, Get Answer, Expert's Help, Thyroid disorders Discussions

Write discussion on Thyroid disorders
Your posts are moderated
Related Questions
Q. What is a population? In the Biology a population is a set of individuals of the same species living in a given place and in a given time.

What is Cardiac Transplantation ? Cardiac Transplantation :  The first successful clinical heart transplant was done by Christian Bmnard at Cape Town in South Africa in 196

Hard paste removal -    Hard setting Ca(Ho) 2 paste (like Endocal 10) can be softened by EDTA and removed by file or microdebrider. -    Care must be taken not to gouge or

Define about the Food Production? We know that agriculture comprises the major source of food production. This is very true in a country like ours where the majority of the pop

Q. How does the breathing process correct alkalosis? If the body undergoes alkalosis the respiratory center located in the medulla gets the information and induces the lowering

EPITHELIA L TISSUE OR EPITHELIA Epithelium term coined by Ruysh, it was applied originally to thin skin covering the nipple. (G.epi = upon, thele = nipple) Epithelial tis

wt is an air bladder and its function wt is catadromous and anadromus migration

Q. Calorie requirements for ulcerative colitis? Energy: The calorie requirements must be increased to: 1) Restore weight status and maintain ideal weight. 2) Compensate f

Mechanical Valves They are made of a combination of metal alloys, pyrolite carbon and dacron. Types of Mechanical Valves Caged-ball Valve (Star-Edwards) A me

Chloroplasts Like mitochondria, chloroplasts are also distinctive organelles of eucaryotic cell. But they are found only in plant cells. Chloroplasts contain membranes forming