Question

Dwarfism results due to

• A. Excess secretion of thyroxin
• B. Less secretion of growth hormone
• C. Less secretion of adrenaline
• D. Excess secretion of growth hormone

Answer 1

The correct option is B

Less secretion of growth hormone

The correct option is : B

The explanation for the correct option:

1. The anterior pituitary gland produces growth hormones.
2. Oversecretion of GH causes aberrant bodily growth, resulting in gigantism.
3. The inadequate secretion causes stunted growth, resulting in dwarfism.
4. The symptoms of dwarfism are short arms, legs, short neck, broad chest, etc.

The explanation for the incorrect options:

Option A

1. Goitre is an enlargement of the thyroid gland caused by excessive thyroxin secretion, often known as hyperthyroidism or thyrotoxicosis.
2. Low iodine levels in the body cause high quantities of thyroxin to be produced.
3. Exophthalmos is a disorder in which the eyeballs protrude due to the accumulation of extra fat and fibrous tissue behind the eyes.

Option C

1. The adrenal medulla produces epinephrine.
2. Epinephrine is a stress hormone that is released during any type of emergency circumstance,
3. Therefore the adrenal gland is referred to as an emergency gland.
4. It also prepares the body for fright, and so is also known as flight or fight, hormones.

Option D

1. The growth hormone is secreted from the pituitary gland.
2. The hyper secretion of growth hormone causes gigantism.
3. It leads to aggressive nature ,long hands and legs.

Final answer: Dwarfism results due to less secretion of growth hormone.