PATHOLOGY

PATHOLOGY MCQ

ENDOCRINE SYSTEM

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

What gland secretes thyroxine?

A	Adrenals
B	Parathyroids
C	Pineal Body
D	Thyroid

Explanation:

Detailed explanation-1: -The thyroid gland, anterior pituitary gland, and hypothalamus comprise a self-regulatory circuit called the hypothalamic-pituitary-thyroid axis. The main hormones produced by the thyroid gland are thyroxine or tetraiodothyronine (T4) and triiodothyronine (T3).

Detailed explanation-2: -The thyroid gland makes and releases two thyroid hormones: thyroxine (T4) and triiodothyronine (T3). The thyroid gland and the pituitary gland work together. The pituitary gland (located near the base of the brain) makes, stores, and releases thyroid-stimulating hormone (TSH).

Detailed explanation-3: -The hypothalamic-pituitary axis regulates TSH release through hypothalamic neurons that secrete thyroid releasing hormone (TRH), a hormone that stimulates thyrotrophs in the anterior pituitary to secrete TSH.

There is 1 question to complete.