What is digestion?

What is digestion?

• A. Breaking down foods into simple molecules
• B. The absorption of nutrients into blood
• C. The chemical breakdown of fats only
• D. The production of enzymes in the stomach

Answer: (A)

Digestion is the process by which the body breaks down food into smaller, absorbable molecules that can be used by the body's cells. This involves both mechanical actions (like chewing and stomach churning) and chemical actions (saliva, stomach acid, and digestive enzymes) that turn complex foods into simple molecules such as glucose, amino acids, and fatty acids. The statement that best fits this concept describes breaking down foods into simple molecules. Absorption into the bloodstream happens after digestion, not the digestion itself. Breaking down fats only is too narrow, since digestion operates on carbohydrates, proteins, and fats. Producing enzymes in the stomach is part of digestion, but digestion is defined by the breakdown into small molecules, not merely enzyme production.

Digestion is the process by which the body breaks down food into smaller, absorbable molecules that can be used by the body's cells. This involves both mechanical actions (like chewing and stomach churning) and chemical actions (saliva, stomach acid, and digestive enzymes) that turn complex foods into simple molecules such as glucose, amino acids, and fatty acids. The statement that best fits this concept describes breaking down foods into simple molecules. Absorption into the bloodstream happens after digestion, not the digestion itself. Breaking down fats only is too narrow, since digestion operates on carbohydrates, proteins, and fats. Producing enzymes in the stomach is part of digestion, but digestion is defined by the breakdown into small molecules, not merely enzyme production.