Question

Low levels of TSH can be found in

• A. Cretinism
• B. Hyperthyroidism
• C. Hypothyroidism
• D. Jet lag

Answer 1

The correct option is B

Hyperthyroidism

The correct option is B.

Explanation of the correct option:

1. Hyperthyroidism - The anterior pituitary gland produces TSH or thyroid-stimulating hormone. It stimulates the thyroid gland's release of thyroid hormones.
2. When thyroid hormone levels are high (hyperthyroidism), they have a negative feedback effect on the hypothalamus and pituitary gland, causing TSH secretion to decrease.
3. Thyroxine hormone is produced in excess when a person has hyperthyroidism.
4. It could speed up metabolism. Unexpected weight loss, an erratic pulse, perspiration, and agitation are among the signs, but the elderly frequently show none.
5. Radioactive iodine, pharmaceuticals, and occasionally surgery are used as treatments.

Explanations of the incorrect options:

Option A:

1. Cretinism is a medical disorder that affects physical and mental development and is caused by a lack of thyroid hormone (hypothyroidism), which is commonly caused by a lack of dietary iodine during pregnancy.
2. It is one of the causes of underactive thyroid function at birth.

Option C:

1. Hypothyroidism- When the thyroid gland fails to generate enough hormones, hypothyroidism develops.
2. Hypothyroidism can be caused by a variety of things, including Autoimmune illness is a type of autoimmune disease.
3. The most prevalent cause of hypothyroidism is Hashimoto's thyroiditis, an autoimmune condition.

Option D:

1. Jet lag is a physiological condition produced by rapid long-distance trans-meridian (east-west or west-east) travel that disrupts the body's circadian cycles.

Final answer: Low levels of TSH can be found in hyperthyroidism.