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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
Write the cause, symptoms of Grave’s disease, iodine deficiency goitre, cretinism and myxoedema .

1. Grave's Disease or Exophthalmic Goitre:

Cause : It is caused due to the excessive secretion of thyroxine.

Symptoms :

The disease is characterised by increased rate of metabolism, bulging of eyeballs, increased blood pressure and excessive perspiration.

2. Iodine Deficiency Goitre :

Cause : It is caused due to the lack of iodine in food.

Symptoms : It causes enlargement of thyroid gland. It occurs mostly to the people of hilly areas.

3. Cretinism :

Cause : It is caused due to hyposecretion of thyroxine in children.

Symptoms :

The person suffering from cretinism shows
stunted growth, mental retardation and low blood pressure.

4. Myxoedema :

Cause : It is caused due to the hyposecretion of thyroxine in adults.

Symptoms :

The affected person shows low metabolic rate, body temperature, mental retardationand weakness. 



Name the largest endocrine gland.

Thyroid gland.

Name the endocrine gland which is H shaped.

Thyroid gland.

Why is the Parathyroid hormone called hypercalcemic hormone?

PTH or parathyroid hormone is also called hypercalcemic hormone as it increase the calcium level in the blood.

What is goitre?

Goitre is the condition in the the thyroid gland is enlarged and the neck portion becomes swollen .It is due to the deficiency of iodine in our diet which results in the less production and secretion of the thyroid hormones that is hypothyroidism.

Name the cells that the thyroid gland is composed of.

The thyroid gland is composed of the following :
i. Follicles
ii. Stromal tissue