Which flap made of cartilage prevents food and water from entering the respiratory passages?
Epiglottis
Tonsils
Uvula
Appendix
The Correct Answer is A
A. Epiglottis: The epiglottis is a flap of cartilage that covers the laryngeal opening during swallowing to prevent food or liquid from entering the airway.
B. Tonsils: Tonsils are lymphatic tissues in the pharynx that help trap pathogens, not prevent aspiration.
C. Uvula: The uvula helps close off the nasopharynx, not the trachea, during swallowing.
D. Appendix: The appendix is a blind-ended tube attached to the cecum; it plays no role in swallowing or airway protection.
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Related Questions
Correct Answer is C
Explanation
A. Mouth, pharynx, large intestine, small intestine: The small intestine comes before the large intestine in the digestive tract.
B. Mouth, esophagus, stomach, pharynx, small intestine: The pharynx comes before the esophagus, not after.
C. Mouth, pharynx, esophagus, stomach, small intestine: This is the correct order of food movement through the upper GI tract.
D. Mouth, pharynx, stomach, esophagus, anus: The esophagus precedes the stomach, and the anus is the final structure after the large intestine.
Correct Answer is D
Explanation
A. Causes Na⁺ excretion: Aldosterone promotes sodium reabsorption, not excretion, to increase blood volume and pressure.
B. Depletes blood volume: Aldosterone increases blood volume by retaining sodium and water.
C. Causes K⁺ reabsorption: Aldosterone promotes potassium excretion, not reabsorption.
D. Causes Na⁺ and water reabsorption: Aldosterone acts on the renal tubules to reabsorb sodium, which draws water back into circulation, increasing blood volume.
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