Caffeine molecule chemical structure
in orange, printed on front.
Caffeine
is a very common substance that is contained in chocolate,
soft drinks, tea, coffee, and can also be purchased as
capsules, tablets, or powder. Caffeine increases heartbeat,
respiration, basal metabolic rate, and the production of
stomach acid and urine; and it relaxes smooth muscles, notably
the bronchial muscle.
Subjectively, people report that caffeine gives them a "lift." They feel less
drowsy, less fatigued, more capable of rapid and sustained intellectual effort.
They also report improved performance of some manual tasks such as driving. However,
caffeine may restore only those abilities or feelings the person had before fatigue
or boredom set in. Studies have also shown that caffeine decreases reaction time
to both visual and auditory stimuli; it does not significantly alter numerical
reasoning (arithmetic skills) or short-term memory; and it can diminish performance
of manual tasks that involve delicate muscular coordination and accurate timing.
NOTE: To protect
the innocent (and not-so-innocent), the actual name of
the chemical/drug is not printed on the shirt, only adding
to your intellectual superiority as the commoners around
you scratch their heads and wonder why they didn't learn
that symbol in college. But then again, they probably
didn't take chemistry in college. Or even go to college
for that matter. Or to high school.
Only $22.95
|
