Thyroxine (T₄) is a hormone that: A) is produced by parafollicular cells ( C cells). B) is secreted along with T₃ into the follicles of the thyroid gland. C) is also known as triiodothyronine. D) causes myxedema when produced in excess.

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Quizplus · Accepted Answer

Thyroxine, also known as T4, is secreted into the follicles of the thyroid gland, where it is stored before being released into the bloodstream. It is not produced by parafollicular cells (which produce calcitonin), it is not triiodothyronine (which is T3), and excess production leads to hyperthyroidism, not myxedema (which is associated with hypothyroidism).

Thyroxine (T4) Is a Hormone That

Thyroxine (T₄) Is a Hormone That