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______ is a hormone produced by cells found in the thyroid gland that functions to lower blood calcium levels.

Question

BlackTom AI · Accepted Answer

Starting with the question, we’re being asked to identify the thyroid-produced hormone that lowers blood calcium levels.
Option 1: 'Thyroid hormone' (T3/T4) is primarily involved in regulating metabolism and energy use, not directly responsible for lowering calcium in the bloodstream, so this choice does not fit the description.
Option 2: 'Parathyroid hormone' increases blood calcium by acting on bones, kidneys, and the gut; it is produced by the parathyroid glands, not the thyroid, making this option incorrect in both origin and function.
Option 3: 'Calcitonin' is the hormone produced by cells in the thyroid gland (specifically the C cells) whose role includes lowering blood calcium levels by inhibiting osteoclast activity and promoting calcium deposition in bone, which aligns exactly with the prompt.
Option 4: 'Calcidiol' (25-hydroxyvitamin D) is a vitamin D metabolite involved in calcium homeostasis but is produced in the liver (and subsequently activated in the kidney), not produced by the thyroid gland, so this does not match the described source or function.
In summary, the description points to calcitonin as the thyroid-produced hormone that lowers blood calcium, while the other options either come from a different gland, perform different physiological roles, or are not thyroid-derived hormones.

Blank ______ is a hormone produced by cells found in the thyroid gland that functions to lower blood calcium levels.

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类似问题

The parathyroid gland produces para/thormone, which regulates body calcium blood levels and prevents:

The name of the hormone that helps to maintain the level of calcium in the blood is:

Question at position 24 Which hormone is released from the thyroid gland in response to elevated blood calcium levels?AldosteroneParathyroid hormone (PTH)InsulinThyroxineCalcitonin

Question at position 2 The hormone calcitonin functions to:decrease the rate of calcium absorptionstimulate osteoclast activitydecrease the level of calcium ion in the blooddecrease the rate of calcium excretionstimulate osteoblasts and inhibit osteoclasts

Question at position 2 Elevated levels of calcium ion in the blood would stimulate:growth hormonetestosteronecalcitoninthyroid hormone

Question at position 1 During a long illness, Brandon's plasma calcium levels decrease. Which hormone would you expect to see in higher levels than normal in his blood?CalcitoninThyroxineGrowth hormoneInsulinParathyroid hormone

While the Blank system is responsible for bringing calcium into the body, the Blank system is responsible for eliminating excess calcium.

When blood calcium levels are low, Blank ______ calcium is excreted in the urine.

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