The parafollicular cells of the thyroid gland secrete:
a. Calcitonin
b. Epinephrine
c. Parathyroid hormone
d. Thyroglobulin
e. Thyroid stimulating hormone (TSH)
ANS: A
Parafollicular cells of the thyroid gland do not approach the lumen of a thyroid follicle and do not contribute to the synthesis of thyroglobulin.
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