PTA Physical Therapy Assistant

Answer: C - Thyroid stimulating hormone is responsible for causing goiter.

The thyroid gland produces two thyroid hormones: thyroxine (T4) and triiodothyronine (T3) which regulates the usage of energy by the body.

Thyroid stimulating hormone (TSH) is produced by the pituitary gland in order to stimulate the thyroid when there are insufficient thyroid hormones, as in hypothyroidism. The extra production of TSH forms the goiter, which is an abnormal enlargement of the thyroid gland.

The other options are not responsible for causing goiter.

Thyroxine and Triiodothyronine are thyroid hormones.

Iodine is not a hormone. But it is a substance essential in the production of T3 and T4.