Questions: Multiple Select Question Select all that apply Calcium absorption in the small intestine is achieved with the help of calcitonin. hydroxyapetite. calcium-binding protein. Vitamin D.

Multiple Select Question Select all that apply Calcium absorption in the small intestine is achieved with the help of calcitonin. hydroxyapetite. calcium-binding protein. Vitamin D.
Transcript text: Multiple Select Question Select all that apply Calcium absorption in the small intestine is achieved with the help of calcitonin. hydroxyapetite. calcium-binding protein. Vitamin D.
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Solution

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The correct answers are:

  • calcium-binding protein.
  • Vitamin D.

Explanation for each option:

  • Calcitonin: This hormone is involved in lowering blood calcium levels by inhibiting osteoclast activity in the bones and reducing renal tubular reabsorption of calcium, but it does not directly aid in calcium absorption in the small intestine. Therefore, this option is incorrect.

  • Hydroxyapatite: This is a mineral form of calcium apatite found in bones and teeth, providing them with rigidity. It is not involved in the absorption of calcium in the small intestine. Therefore, this option is incorrect.

  • Calcium-binding protein: This protein, also known as calbindin, is crucial for the transport of calcium across the intestinal cells, facilitating its absorption. Therefore, this option is correct.

  • Vitamin D: This vitamin plays a significant role in enhancing calcium absorption in the small intestine by promoting the synthesis of calcium-binding proteins. Therefore, this option is correct.

In summary, calcium absorption in the small intestine is facilitated by calcium-binding protein and Vitamin D.

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