What is the primary function of Pepsin in the stomach?

What is the primary function of Pepsin in the stomach?

• A. To neutralize stomach acid
• B. To break down proteins
• C. To emulsify fats
• D. To facilitate absorption of vitamins

Answer: (B)

Pepsin plays a crucial role in the digestive process by breaking down proteins into smaller peptides. It is an enzyme that is secreted in the stomach in its inactive form, pepsinogen, which becomes activated by stomach acid (hydrochloric acid). This activation occurs in the highly acidic environment of the stomach, which is essential for pepsin’s function. The action of pepsin starts the process of protein digestion, which is vital for the body to utilize amino acids for various functions, including tissue repair, enzyme production, and the synthesis of hormones. By cleaving the peptide bonds within proteins, pepsin contributes significantly to the overall digestive process, preparing the proteins for further breakdown and absorption in subsequent parts of the gastrointestinal tract. The other functions mentioned in the choices, such as neutralizing stomach acid, emulsifying fats, or facilitating the absorption of vitamins, are carried out by different components within the digestive system or liver, rather than by pepsin itself. Thus, the primary function of pepsin is clear and specifically tied to protein breakdown.

Pepsin plays a crucial role in the digestive process by breaking down proteins into smaller peptides. It is an enzyme that is secreted in the stomach in its inactive form, pepsinogen, which becomes activated by stomach acid (hydrochloric acid). This activation occurs in the highly acidic environment of the stomach, which is essential for pepsin’s function.

The action of pepsin starts the process of protein digestion, which is vital for the body to utilize amino acids for various functions, including tissue repair, enzyme production, and the synthesis of hormones. By cleaving the peptide bonds within proteins, pepsin contributes significantly to the overall digestive process, preparing the proteins for further breakdown and absorption in subsequent parts of the gastrointestinal tract.

The other functions mentioned in the choices, such as neutralizing stomach acid, emulsifying fats, or facilitating the absorption of vitamins, are carried out by different components within the digestive system or liver, rather than by pepsin itself. Thus, the primary function of pepsin is clear and specifically tied to protein breakdown.