The Body Uses Atoms in Different Ways to Accomplish Different

question 8

Multiple Choice

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?

• A) The bone contains calcium salts, which are less reactive than the calcium ions found in the blood.
• B) The calcium in blood is a more reactive form of the atom and therefore has fewer protons than the calcium in bone.
• C) There are many different isotopes of calcium, and the most reactive isotope is found in the bone.
• D) The calcium in blood has a lighter atomic mass than the calcium in bone and is in a more reactive form.

---

Definitions:

Population Proportions

The ratio of individuals in a population who possess a certain attribute to the total population.

Expected Frequency

In statistics, the forecasted count of occurrences across different categories or intervals in a study.

Significant Change

A statistically important difference or alteration between two or more variables or sets, indicating a divergence beyond random variations.

Marascuilo Procedure

The Marascuilo Procedure is a statistical method used to simultaneously compare proportions among multiple groups to identify significant differences.