25. Caffeine is a competitive inhibitor for adenosine in the brain. Caffeine binds to adenosine receptors in the brain which prevents adenosine from binding. In normal physiological function, adenosine binds to receptors and causes symptoms such as drowsiness. Caffeine means less adenosine can take effect in the body.
26. High fever can be devastating to internal bodily symptoms. The proteins in our body have specific confirmations. Any disruptions such as heat or pH change can cause proteins to lose their native confirmation and thus function. Obviously proteins that can't carry out their normal function could cause serious problems within the body.