What does the thyroid gland secrete?
Calcitonin
The thyroid is a butterfly-shaped endocrine gland located in the neck.
Its follicular cells secrete thyroxine (T4) and triiodothyronine (T3), while its parafollicular C cells secrete calcitonin, which lowers the calcium level in the blood.
Melanocyte-stimulating hormone comes from the pituitary, and oxytocin and vasopressin are made in the hypothalamus and released from the posterior pituitary, so of the given hormones only calcitonin is a thyroid secretion.
Hence, Calcitonin.
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