HUMAN NUTRITION

Detailed explanation-1: -If people consume more carbohydrates than they need at the time, the body stores some of these carbohydrates within cells (as glycogen) and converts the rest to fat. Glycogen is a complex carbohydrate that the body can easily and rapidly convert to energy. Glycogen is stored in the liver and the muscles.

Detailed explanation-2: -Sugars and starches can be broken down by our bodies and used as energy. Fiber cannot be broken down for energy, but has other important functions in the body. Most foods that we eat contain at least some carbohydrates.

Detailed explanation-3: -Carbohydrates are the nutrients most frequently used as an energy source (containing 4kcal per gram), as they are fast-acting and turn into energy as soon as they are ingested. This energy powers the brain and body. The energy that powers the brain and body is generated when carbohydrates are broken down.

Detailed explanation-4: -Fat stores are used for energy only after muscles have depleted their carbohydrate energy store. Homework.Study.com.