Physiology Quiz: Thyroid Gland and Thyroid Hormones - Part 13

Physiology Quiz -
Thyroid Gland and Thyroid Hormones - Part 13

The thyroid gland is an endocrine gland whose hormone products perform many important functions. Test your basic knowledge of the thyroid gland, its hormone products, and the effect of these hormones on target tissues by taking this simple quiz.

(1) During fetal development, abnormally low levels of the thyroid hormones result in a condition known as:

	(A) Goiter
	(B) Cretinism
	(C) Hashimoto's disease
	(D) Graves' disease
	(E) Myxedema

(2) The thyroid hormones T₃ (triiodothyronine) and T₄ (thyroxine) exert negative feedback on the:

	(A) Thyroid gland
	(B) Hypothalamus
	(C) Anterior pituitary
	(D) Posterior pituitary

(3) The thyroid hormones T₃ (triiodothyronine) and T₄ (thyroxine) provide feedback to the hypothalamus. This feedback causes the hypothalamus to:

	(A) Reduce the synthesis and release of the thyrotropin releasing hormone (TRH)
	(B) Increase the synthesis and release of the thyrotropin releasing hormone (TRH)
	(C) Reduce the synthesis and release of the thyroid stimulating hormone (TSH)
	(D) Increase the synthesis and release of the thyroid stimulating hormone (TSH)

(4) The thyroid hormones T₃ (triiodothyronine) and T₄ (thyroxine) provide feedback to the anterior pituitary. This feedback causes the anterior pituitary to:

	(A) Reduce the synthesis and release of the thyrotropin releasing hormone (TRH)
	(B) Increase the synthesis and release of the thyrotropin releasing hormone (TRH)
	(C) Reduce the synthesis and release of the thyroid stimulating hormone (TSH)
	(D) Increase the synthesis and release of the thyroid stimulating hormone (TSH)

(5) The clinical manifestation(s) of hypothyroidism may include:

	(A) Reduced metabolic rate
	(B) Chronic fatigue
	(C) Weight gain
	(D) Myxedema
	(E) Depression