Question

which substances in food specifically help the body grow, repair, and function? a) oxygen b) calories c) nutrients d) exercise what is the bodys main (primary) source of energy? a) proteins b) fats c) water d) carbohydrates which nutrient is responsible for building and repairing muscles and tissues? a) fats b) proteins c) carbohydrates d) water

Explanation:

1. For the first question: Nutrients are the specific components in food that support growth, repair, and bodily functions. Oxygen is not a food substance, calories are a measure of energy, and exercise is not a food component.
2. For the second question: Carbohydrates are broken down quickly into glucose, which the body uses as its primary, most accessible energy source. Proteins and fats are used for energy only when carbohydrates are scarce, and water has no energy value.
3. For the third question: Proteins are made of amino acids, which are the building blocks for muscle and tissue growth, maintenance, and repair. Fats and carbohydrates primarily provide energy, and water supports bodily processes but does not build tissue.

Answer:

1. C) Nutrients
2. D) Carbohydrates
3. B) Proteins