PATHOLOGY MCQ
RESPIRATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Why do cilia push mucus towards the esophagus (which leads to the stomach)?
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The esophagus uses mucus to help food move more easily.
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The stomach needs the mucus to help digest food.
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The acid in the stomach kills germs in the mucus.
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The mucus contains nutrients that get absorbed in the stomach.
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Explanation:
Detailed explanation-1: -bacterial infections. viral infections, such as common cold and flu. sinus infections. gastroesophageal reflux.
Detailed explanation-2: -The mucus shields the stomach wall from the digestive enzyme pepsin’s self-digestion as well as the acidic quality of the gastric juice.
Detailed explanation-3: -Stomach: mucus and hydrochloric acid The inner mucus layer, built around MUC5AC, acts as a diffusion barrier for hydrochloric acid. The surface epithelial cells secrete bicarbonate, creating a pH gradient from the acidic lumen to neutral pH at the cell surface.
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