The body uses atoms in different ways to accomplish different tasks. For example, one portion of the body's calcium supply strengthens bones, whereas another portion combines with proteins to stimulate blood clotting after tissue injury. Which of the following statements provides the most logical chemical explanation of calcium's ability to perform such different functions?

Question

Quizplus · Accepted Answer

The calcium in bones is present in the form of calcium salts and is less reactive than the calcium ions found in the blood. This explains why it can perform the task of strengthening bones, while the more reactive form of calcium ions in the blood can combine with proteins for blood clotting after tissue injury. Option B, C, and D are incorrect as they are not supported or explained by any scientific evidence.

The Body Uses Atoms in Different Ways to Accomplish Different