Move a deciduous tree in early spring before it begins to leaf out or early fall after the leaves begin to turn color. Donât move evergreens during a growth flush or in the fall when itâs too late for them to become established before winter weather arrives. Late summer is usually a good time to move evergreens.
Caffeine is a central nervous system stimulant that reduces fatigue and drowsiness. At normal doses, caffeine has variable effects on learning and memory, but it generally improves reaction time, wakefulness, concentration, and motor coordination.
How Caffeine Affects the Nervous System. A cup of coffee on a table. Caffeine, chemically known as 1,3,7-trimethylxanthine, is considered to be the most popular, largely unregulated drug in the world. Caffeine is consumed in coffee, tea, cocoa, chocolate, many soft drinks and some drugs. Natural sources of caffeine include coffee beans, tea leaves, kola nuts, guarana berries and cacao pods. Like every drug, caffeine affects the nervous system in multiple ways, some of which are desirable, but many of which are unwanted.