Name the hormone released in the gland when the thyroid level is low.
The correct option is D T4
The function of the thyroid gland is regulated by a feedback mechanism involving the brain.
When thyroid hormone levels are low, the hypothalamus in the brain produces a hormone known as thyrotropin-releasing hormone (TRH), which causes the pituitary gland (located at the base of the brain) to release thyroid-stimulating hormone (TSH).
TSH stimulates the thyroid gland to release more T4.
Since the thyroid gland is controlled by the pituitary gland and hypothalamus, disorders of these tissues can also affect thyroid function and cause thyroid problems.