NATS 1565 Study Guide - Final Guide: Hemileia Vastatrix, Caffeine, Paracetamol
6 May 2019
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Document Summary
Caffeine - caffeine and related stimulants belong to a class of chemicals called alkaloids, which are substances mainly produced by plants. Although the roles of some alkaloids are still uncertain, it is believed that in plants caffeine functions as an insecticide that discourages insect pests. Alkaloids have diverse physiological and psychological effects on animals, for instance, caffeine and caffeinelike alkaloids are stimulants to the central nervous system. Benefits: caffeine is known to speed the heartbeat, increase blood pressure, stimulate respiration, and constrict blood vessels. It has long been used to alleviate fatigue and drowsiness, thereby promoting alertness and endurance. Caffeine also improves athletic performance by drawing on fat reserves for energy. Caffeine enhances the pain- relieving effects of aspirin and acetaminophen and is found in many over-the-counter and prescription drugs. Negative effects: caffeine can cause insomnia, nervousness, irritability, and indigestion.
