Question

Choose the correct answer from the options given below:

Cretinism and Myxoedema are due to

• A. Hypersecretion of thyroxin
• B. Hypersecretion of growth hormone
• C. Hyposecretion of thyroxin
• D. Hyposecretion of growth hormone

Answer 1

The correct option is C

Hyposecretion of thyroxin

The correct option is C

Explanation for the correct option:

1. Thyroxin is a hormone secreted by the thyroid gland.
2. It is made from iodine and it is responsible for the metabolism, growth and development of body.
3. When hormone secretion is very low it is called hyposecretion.
4. Here in both Cretinism and myxoedema secretion of thyroxin is very low and this condition is known as hypothyroidism.
5. Cretinism occur in case of children whereas myxoedema is a deficiency condition in adults of thyroxin.

Explanation for the incorrect option

Option A:

1. Hypersecretion of thyroxin is excess secretion of thyroxin.

Option B:

1. Hypersecretion of growth hormone is excess secretion of growth hormone which causes gigantism in case of children and acromegaly in case of adults.

Option D:

1. Hyposecretion of growth hormone: In this condition their is very low secretion of growth hormone during childhood cause dwarfism.

Final answer: Cretinism and Myxoedema are due to hyposecretion of thyroxin.