What is the best definition of calorie? calorie, a unit of energy or heat variously defined. The calorie was originally defined as the amount of heat required at a pressure of 1 standard atmosphere to raise the temperature of 1 gram of water 1° Celsius. It is commonly used as the unit for heat capacities, latent heats, and heats of reaction.
What does calorie mean?
1 : a unit for measuring heat equal to the amount of heat required to raise the temperature of one gram of water one degree Celsius. 2 : a unit of heat used to indicate the amount of energy foods produce in the human body that is equal to 1000 calories. calorie.
What is the difference between calorie and calorie in biology?
The physical unit "calorie" is the energy required to increase the temperature of one gram of water by 1 degree Celsius, and the dietary Calorie is a kilocalorie = 1000 calories. It is common practice to just use the unit kcal to avoid the confusion between "calorie" and "Calorie" .
What is calories in body?
Calories are the amount of energy released when your body breaks down (digests and absorbs) food. The more calories a food has, the more energy it can provide to your body. When you eat more calories than you need, your body stores the extra calories as body fat. Even a fat-free food can have a lot of calories.
What is a calorie in biological physiological terms?
Calorie A unit of heat equal to the amount of heat needed to raise the temperature of 1,000 grams of water by one degree Celsius. This unit is used as a measure of the energy released by food as it is digested by the human body.
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What is the scientific term for calorie?
Calorie: A unit of food energy. The word calorie is ordinarily used instead of the more precise, scientific term kilocalorie. A kilocalorie represents the amount of energy required to raise the temperature of a liter of water 1' centigrade at sea level.
How does the body process calories?
Food processing (thermogenesis).
Digesting, absorbing, transporting and storing the food you consume also takes calories. About 10 percent of the calories from the carbohydrates and protein you eat are used during the digestion and absorption of the food and nutrients.
How do calories work?
The amount of energy in an item of food or drink is measured in calories. When we eat and drink more calories than we use up, our bodies store the excess as body fat. If this continues, over time we may put on weight. As a guide, an average man needs around 2,500kcal (10,500kJ) a day to maintain a healthy body weight.
What is another name for calorie?
The large calorie, food calorie, or kilocalorie (Cal, Calorie or kcal), most widely used in nutrition, is the amount of heat needed to cause the same increase in one kilogram of water.
Why are kilocalories called calories?
To avoid confusion between large and small calories, it's thought that the term kilocalorie — the prefix “kilo” meaning 1,000 — was created to refer to a large calorie ( 1 ). However, the term small calorie is rarely used today outside of physics and chemistry research.
What is kcal in chemistry?
Illustrated Glossary of Organic Chemistry - Kilocalorie (kcal; food calorie; large calorie) Kilocalorie (kcal): A energy unit equal to one thousand calories. When referring to the energy content of food, one calorie (also called a food calorie or a large calorie) is equal to one kilocalorie.
How do you calculate calories in chemistry?
Simplified, it's just Calories = water mass * temp change. Divide total calories of each food item by its mass to obtain Calories per gram.
Why are calories so important?
Calories and health. The human body needs calories to survive. Without energy, the cells in the body would die, the heart and lungs would stop, and the organs would not be able to carry out the basic processes needed for living. People absorb this energy from food and drink.
What are examples of calories?
For example, 2 cups of shredded romaine lettuce or spinach have 16 calories, a large stalk of celery has 10 calories, 1 large ear of corn has 123 calories, 1 cup of broccoli has 15 calories and an orange has 70 calories, according to the USDA Nutrition Database.
Why calorie count is important?
Calorie monitoring helps many people lose weight and maintain a healthy weight in the long term. Recording calories is a good way to track your daily average. To do this, you can use a variety of apps or start a food diary. Ask your doctor about how many calories you should have each day.
What is the definition of nutrition in biology?
Nutrition: 1: The process of taking in food and using it for growth, metabolism, and repair. Nutritional stages are ingestion, digestion, absorption, transport, assimilation, and excretion.
What is a calorie quizlet biology?
A calorie is the amount of energy needed to raise temperature of 1 gram of water 1 degree Celsius. Measure of heat energy in food; equivalent to 1000 calories.
How is calorie related to Joule?
Calorie and Joule are the units of energy. The relation between calorie and joule is proportionate. This implies any change in Calorie will change its equivalent value in Joules.
Calorie to Joule.
|1,000 or 1kcal||4184|
|5,000 or 5 kcal||20920|
|10,000 or 10 kcal||41840|
Is calorie a unit of energy?
A calorie is a unit that is used to measure energy. The Calorie you see on a food package is actually a kilocalorie, or 1,000 calories. A Calorie (kcal) is the amount of energy needed to raise the temperature of 1 kilogram of water 1 degree Celsius.
What is the root of the word calorie?
From the Latin calor, “to heat,” a calorie is a measurement of heat energy (it may be called a small calorie or a large calorie).
What is the body's main source of energy?
Carbohydrates are the main energy source of the human diet. The metabolic disposal of dietary carbohydrates is direct oxidation in various tissues, glycogen synthesis (in liver and muscles), and hepatic de novo lipogenesis.
Where do calories absorb?
A vomit can only remove up to about half of the calories eaten - which means that, realistically, between half to two thirds of what is eaten is absorbed by the body. This is because absorption begins in the mouth (through the saliva), continues in the oesophagus, and then in the stomach.
Are calories absorbed in stomach or intestine?
In normal digestion, food passes through the stomach and enters the small intestine, where most of the nutrients and calories are absorbed. It then passes into the large intestine (colon), and the remaining waste is eventually excreted.
Where do calories get digested?
They are absorbed in our small intestines; game mostly over. More complex foods, on the other hand, such as cassava or almonds, have to travel to the colon where they meet up with the largest concentrations of our little friends, the microbes.
Do calories really count?
Counting calories (or fat grams) is far easier than actually understanding the complex effects food has on our bodies (and our waistlines). Calories do count, but they are far from the whole picture. "Food produces hormonal effects in the body," he says.
Are calories fat?
What is the opposite of a calorie?
The word calorie typically refers to the unit of energy. There are no categorical antonyms for this word. However, one could loosely refer to negative calories as an antonym (a proposed effect in which certain foods cost more calories to digest than they provide to the body).
What is the unit to measure energy also known as calories?
Explanation: The joule(J) is the SI standard unit for energy. The kilocalorie is also known as calorie. One kilocalorie equals one calorie in nutrition.
What is another word for the immune system?
What is another word for immune system?
|body's defensesUS||immune response|
|natural defenses||natural resistance|
|white blood cells||white corpuscles|
Why are calories used instead of joules?
The term calorie refers to a measurement of energy that comes from the French term "calor," meaning heat. However, the use of calories over joules on American food labels is simply a preference -- think of it as the energy equivalent of using "miles" instead of "kilometers."
Who invented the calorie?
Silbermann, invented the Calorie in 1852. Other texts state that a German physician, Julius Mayer, effectively invented the Calorie in a study he published in 1848. Hargrove credits the French chemist Nicholas Clement with the invention, however, citing lecture notes from Clement that define the term as early as 1819.
Is a KJ a calorie?
1 kilojoule = 0.24 Calories (about ¼)
For those who still work in calories, we also provide Calorie information in the nutrition information panel.
What is the unit of energy used in biology?
The SI unit of energy, work, and heat is the joule (J). A joule is a tiny amount of energy. For example, it takes about 4 J to warm 1 mL of H 2O by 1°C. Many processes occur with energy changes in thousands of joules, so the kilojoule (kJ) is also common.
What is difference between Cal and Cal?
The "calorie" we refer to in food is actually kilocalorie. One (1) kilocalorie is the same as one (1) Calorie (uppercase C). A kilocalorie is the amount of heat required to raise the temperature of one kilogram of water one degree Celsius.
How many calories is in sperm?
Semen is a complex substance created by the male reproductive organs. The fluid is made mostly of water, plasma, and mucus (a lubricating substance). It also contains 5 to 25 calories, and is made up of small amounts of essential nutrients including: Calcium.
How do scientists measure calories in food?
To use this tool, scientists place the food in question in a sealed container surrounded by water and heat it until the food is completely burned off. Scientists then record the rise in water temperature to determine the number of calories in the product.