Question

Xi needs to stay awake another hour to study for his English final, so he drinks several cups of cola. When he's done studying, he finds that he can't sleep even though he wants to, he feels agitated, his muscles twitch, his heartbeat is irregular, and he feels nauseated. What is causing Xi to feel this way?

a. caffeine
b. insomnia
c. narcolepsy
d. sugar

Answer 1

Xi is feeling this way because of caffeine. Drinking several cups of cola, which contains a high amount of caffeine, to stay awake can lead to insomnia, agitation, muscle twitching, irregular heartbeat, and nausea.

Step-by-step explanation:

Xi is feeling this way because of caffeine.

When Xi drinks several cups of cola to stay awake, he consumes a high amount of caffeine. Caffeine is a central nervous system stimulant that blocks the action of adenosine, a neurotransmitter that promotes sleep. By inhibiting adenosine receptors, caffeine decreases sleepiness and promotes wakefulness. However, consuming too much caffeine can lead to side effects such as insomnia, agitation, muscle twitching, irregular heartbeat, and nausea, which are all symptoms Xi is experiencing.

Answer 2

The correct answer is a. sugar

Step-by-step explanation:

Even though caffeine is also known for uprising the energy levels to a point where it could cause insomnia, the excess of sugar usually causes an increase in heart rate and insomnia. Also, coca-cola has a bigger amount of sugar than caffeine, so it explains how these high quantities could affect Xi's health.