Question

Consider the following hormones :

What is the correct sequence of the release of these hormones ?

• A. 1-2-3
• B. 2-1-3
• C. 2-3-1
• D. 1-3-2

Answer 1

The correct option is A

1-2-3

The correct option is A:

Explanation of the correct option :

Neurons in the hypothalamus release TRH, or thyroid-releasing hormone, which stimulates thyrotrophs of the anterior pituitary to secrete TSH. TSH, in turn, stimulates thyroid follicular cells to release thyroid hormones Thyroxine(T₄).

Releasing order:

Thyrotrophin Releasing Hormone (TRH) - Thyroid-stimulating Hormone (TSH) - Thyroxine (T₄)

Explanation of the incorrect option:

Option B:

Releasing order:

Thyrotrophin Releasing Hormone (TRH) - Thyroid-stimulating Hormone (TSH) - Thyroxine (T₄)

Option C:

Releasing order:

Thyrotrophin Releasing Hormone (TRH) - Thyroid-stimulating Hormone (TSH) - Thyroxine (T₄)

Option D:

Releasing order:

Thyrotrophin Releasing Hormone (TRH) - Thyroid-stimulating Hormone (TSH) - Thyroxine (T₄)

Final answer: 1-2-3 is the correct sequence.