Caption: Caffeine crystals. Caffeine is an alkaloid found naturally in such foods as coffee beans, tea, kola nuts and cacao beans. Caffeine has a characteristic bitter taste. Its main pharmacological properties are: a stimulant action on the central nervous system with psychotropic effects and stimulation of respiration, a stimulation of the heart rate, and a diuretic effect. Caffeine is a drug and consumption leads to pharmacologic tolerance with defined withdrawal symptoms.
Magnification*: x20
Type: LM
Copyright 1985 Dennis Kunkel Microscopy, Inc.
Keywords: 880328-03,12.01.04,crystal,crystals,caffeine,psychotropic effects,respiratory stimulant,stimulant,drug,heart rate increase,heart rate stimulant,nervous system stimulant,alkaloid,coffee bean,coffee beans,tea,diuretic effect,LM