Body & HealthFact

A calorie is really a water temperature.

A kilocalorie is the energy needed to warm 1 kilogram of water by 1 degree Celsius, about 4.2 kilojoules. What food labels call a calorie is always this kilocalorie. The value used to be measured by burning food in a chamber and recording the temperature rise of the surrounding water. Today it is mostly calculated from composition.

Useful: 2,000 kilocalories a day works out to a continuous output of about 100 watts.

Source: en.wikipedia.org

Energie Ernaehrung

Difficulty:

Related cards

The rule '8 glasses of water a day' has no source.In 2002 a kidney physiologist searched for the scientific evidence behind the 8-glasses rule and …
The numbers 4, 4, 9 and 7 are on every food label, hidden.Calorie figures are no longer measured but calculated, using the 19th-century Atwater system: 4 …
How your blood sugar stays stable whatever you eat.Your blood carries only about 4 to 5 grams of sugar, a teaspoon. When the level rises after a meal …
You burn most of your energy lying down.Think of your energy use as three items. Basal metabolism: breathing, heartbeat, cell maintenance …
Your brain runs on the power of a dim light bulb.The brain weighs about 1.4 kilograms, roughly 2 percent of your body, yet uses around 20 percent of …
Your tank of fast energy lasts about 30 kilometres.Your body stores carbohydrate as glycogen: about 400 grams in the muscles and roughly 100 grams in …
Your stomach sends hunger on a timetable, not on demand.Ghrelin is the hunger hormone. It is produced mainly in the stomach wall, rises before your usual …
Caffeine doesn't give energy. It hides tiredness.The longer you are awake, the more adenosine accumulates in your brain and binds to receptors that …

Keep reading

This card belongs to the topic Body & Health. Every card is short, cites a source and can be saved – due ones come back by themselves later.

About Doomlearn · Projects · Legal notice · Privacy · Terms