When the maximal response to a drug reaches the ceiling, it can become toxic, especially to the:

At temperatures above ____, biochemical reactions within the cells start to malfunction.

A. 18°C B. 28°C C. 38°C D. 48°C

Which of the following statements describes race as an predisposing factor of utilization?

A. When education, income, and occupation are controlled, most of the differences among the races disappear. B. Differences in utilization cannot be explained by socioeconomic factors. C. Whites use less physician services than blacks and Hispanics. D. None of the above