| School science animation "Coffee" : The animation contains nonvolatiles such as caffeine, it also details the stimulation effect of caffeine on the nervous system. Caffeine acts as a mild stimulant to the nervous system, blocking the neurotransmitter adenosine. This animated chemistry topic gives in-depth information about coffee and its chemistry and is very useful for school teachers and students both.
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Content of the animation :
Coffee is prepared from the roasted seeds (beans) of the
coffee plant. Coffee contains nonvolatiles such as caffeine,
trigonelline, chlorogenic acid, phenolic acids, amino acids,
carbohydrates, and minerals. Important volatiles are organic
acids, aldehydes, ketones, esters, amines, and mercaptans.
The principal physiological effects of coffee are due to
caffeine, an alkaloid that acts as a mild stimulant
Caffeine acts as a mild stimulant to the nervous system,
blocking the neurotransmitter adenosine and resulting in
a feeling of well-being and alertness. It increases the
heart rate, blood pressure, and urination and stimulates
secretion of stomach acids; excessive intake can result
in restlessness, insomnia, and heart irregularities. The
effects of caffeine vary from person to person, as people
excrete it at different rates.
It is harmless when taken in small amount but when taken
in excess it can cause nervousness, loss of sleep, headaches
and digestive trouble.
All about it inside the animation.
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(For age - group :
11 - 16
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