Approximately, __________ of the thyroid hormones released into the bloodstream by the thyroid gland is in the form of tetraiodothyronine (T4, also known as thyroxine).

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Physiology Test Question

Approximately, __________ of the thyroid hormones released into the bloodstream by the thyroid gland is in the form of tetraiodothyronine (T₄, also known as thyroxine).

	(A) 1%
	(B) 5%
	(C) 10%
	(D) 50%
	(E) 90%

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Posted: Sunday, January 4, 2015
Last updated: Sunday, January 4, 2015