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
In which meiotic division does the separation of identical chromatids occur? After the end of this process what are the ploidies of the new cells? The separation of identical c

elementatr cannal and feeding mechenism

Q. What is the difference between cerebrum and brain? What are the major parts of these structures? The concept of brain or encephalon comprehends the cerebrum mostly referred

Homologous structures are the body parts in different organisms which have similar bones and similar arrangements of the blood vessels, muscles, and nerves and go through similar

What are the differences between genomes in prokaryotes vs. eukaryotes?

Q. Investigation of aortic regurgitation by Echocardiogram? Echocardiography is done to confirm the diagnosis of aortic regurgitation, evaluate the cause of AR and assess the a

Explain TechnologicaI advances of clinical dietitian TechnologicaI advances in nutritional  support for the critically ill have enhanced the clinical dietitian's role. In the

What is ISQ In resonance frequency analysis implant stability quotient (ISQ) is use to quantify the frequency measurement of implants within a range between 3500 and 8500 HZ. I

Q. How do the potassium and sodium ions maintain the resting potential of the neuron? The plasma membrane of the neuron when at rest maintains an electric potential difference

Compared to the original sequence what type of mutation occurred on the following DNA sequence? Original: TACGAATTCGATAC Mutant: TACASSTTCCATAC