During Thyroid Hormone Secretion

question 244

Multiple Choice

During thyroid hormone secretion,

• A) the follicular cells phagocytize a piece of colloid.
• B) T4 and T3 are split off of thyroglobulin by lysosomal enzymes within the follicular cell and subsequently diffuse out of the cell into the blood.
• C) T4 and T3 are secreted by exocytosis of the colloid that has been internalized by the follicular cells.
• D) both (a) and (b) above.
• E) both (a) and (c) above.

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