A person who does not feel very alert but does have an elevated heart rate after consuming a highly caffeinated drink likely:
A) has tolerance to the subjective effects and sensitization to the physiological effects of caffeine.
B) has tolerance to the subjective effects not the physiological effects of caffeine.
C) has tolerance to both the subjective and physiological effects of caffeine.
D) has sensitization to both the subjective and physiological effects of caffeine.

Question

Quizplus · Accepted Answer

This person's lack of alertness suggests that they have developed tolerance to the subjective effects of caffeine, meaning they may not feel as energized or awake as they once did after consuming caffeine. However, the elevated heart rate suggests that they have not developed tolerance to the physiological effects of caffeine, which can still increase heart rate even if they do not feel much of a subjective boost.

A Person Who Does Not Feel Very Alert but Does