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

Question

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

BlackTom AI · Accepted Answer

Question restatement: When Brandon experiences a drop in plasma calcium during a long illness, which hormone would you expect to be found at higher-than-normal levels in the blood?
Answer options: Calcitonin, Thyroxine, Growth hormone, Insulin, Parathyroid hormone

Option 1: Calcitonin. This hormone is produced by the thyroid gland and lowers blood calcium levels by inhibiting osteoclast activity and promoting calcium deposition in bone. Since Brandon has low calcium, calcitonin would not be elevated; in fact, its action would counteract the needed rise in calcium. Therefore this option is incorrect for a state of hypocalcemia.

Option 2: Thyroxine. Thyroxine (thyroxine hormone) primarily regulates metabolism and does not play a direct, immediate role in calcium homeostasis. Its levels do not rise in response to low calcium, so this option is not consistent with the physiological response to hypocalcemia.

Option 3: Growth hormone. Growth hormone has many metabolic effects and some influence on bone growth, but it is not the principal regulator of acute calcium balance. It does not respond acutely to low calcium by increasing calcium in the blood, making this option unlikely in the context of hypocalcemia.

Option 4: Insulin. Insulin controls glucose metabolism and cellular uptake of glucose; it has no direct, primary role in maintaining extracellular calcium levels. An increase in insulin in response to low calcium would be anatomically and physiologically unsupported, so this choice is incorrect.

Option 5: Parathyroid hormone. Parathyroid hormone (PTH) is the key regulator of calcium homeostasis in response to low serum calcium. When calcium falls, the parathyroid glands secrete more PTH, which increases calcium reabsorption from bone, enhances renal reabsorption of calcium, and stimulates production of active vitamin D to boost intestinal calcium absorption. Given Brandon’s hypocalcemia, a rise in PTH is the expected compensatory mechanism, making this option correct.

Summary: Among the listed hormones, only parathyroid hormone directly counteracts low calcium by raising serum calcium through bone resorption, kidney reabsorption, and vitamin D activation. The other hormones either lower calcium, regulate unrelated processes, or have no direct primary role in acute calcium balance.

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

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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

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

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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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

查看解析

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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

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

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.

更多留学生实用工具

希望你的学习变得更简单

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