If a patient has a significantly reduced number of parietal cells in their stomach lining, which consequence follows regarding protein digestion?

💡 Explanation

Pepsinogen requires an acidic environment (provided by parietal cells secreting hydrochloric acid) for activation into pepsin, therefore a reduced number of parietal cells will impair protein digestion due to decreased pepsin activation, because there is not enough acid for the zymogen to activate. The answer is decreased pepsin, rather than the other options, because they represent other stages of digestion or other enzyme activity.

• Why does impaired neural signal transmission often persist following a concussion, even after macroscopic brain imaging appears normal?
• What distinguishes accommodation in a young, healthy eye from an aging eye focusing on a near object?
• An aging athlete experiences reduced lung capacity. Why does diminished elastin production increase the likelihood of alveolar collapse during exhalation?
• Why does rapid elbow extension during a baseball pitch increase risk of ulnar collateral ligament (UCL) tears more than slower extension?
• Why does a subsequent exposure to pollen provoke a stronger allergic reaction in sensitized individuals compared to the initial exposure?
• If a long-distance runner experiences a sharp decline in performance despite maintaining pace, which consequence related to intramuscular lactate accumulation is most likely?