AP BIOLOGY

Detailed explanation-1: -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.

Detailed explanation-2: -Glucose, or blood sugar, is the main source of energy for your body’s cells, tissues, and organs. Glucose can be used immediately or stored in the liver and muscles for later use.

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: -The body preferentially breaks down carbohydrates first, and then fats and finally proteins only if the other two fuels are depleted. This is important as proteins are generally less efficient at generating energy.

Detailed explanation-5: -Grains-along with fruits, vegetables, and dairy-contain carbohydrates, the body’s main source of energy.