The hormone calcitonin is secreted by the Blank______ gland.Multiple choice question.adrenalthymusparathyroidthyroid

Breakdown of the Problem

1. Identify the hormone calcitonin and its source.
2. Review the options provided.

Relevant Concepts

• Calcitonin is a hormone involved in calcium metabolism.
• It is primarily associated with a specific gland.

Analysis and Detail

Calcitonin is produced by the parafollicular cells (C cells) of the thyroid gland. Its primary function is to lower blood calcium levels by inhibiting osteoclast activity in the bones and decreasing renal tubular reabsorption of calcium.

Verify and Summarize

Among the options provided:

1. Adrenal gland: Produces hormones like adrenaline and cortisol.
2. Thymus: Involved in immune function.
3. Parathyroid: Secretes parathyroid hormone, which increases blood calcium levels.
4. Thyroid: Known to produce calcitonin.

Thus, it is verified that calcitonin is secreted by the thyroid gland.

Final Answer

Calcitonin is secreted by the thyroid gland.