During swallowing of food which structure closes the nasal opening?
Correct answer: B. Soft Palate
- A. Hard Palate
- B. Soft Palate
- C. Epiglottis
- D. Larynx
Explanation
Option [A] hard palate plays a significant role as it separates the oral cavity from the nasal cavity and aiding swallowing and speaking.Option [B] The backward movement of the tongue pushes the soft palate up and closes the nasal opening at the back.So option [B] is right.Option [c] epiglottis ;The epiglottis is a flap of cartilage which is forced by the tonge[during swallowing] into more or less horizontal position thus closing the opening of the windpipe[the glottis].Option[D] larynx is the cartilage round the top of the windpipe which moves upward under the back of the tongue during swallowing
This question appeared on the UHS MDCAT 2010 paper, which you can sit online with every answer explained.
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The human digestive system breaks food into absorbable molecules through mechanical processing, enzyme action and chemical conditions along the alimentary canal. Questions cover the mouth, stomach, small and large intestines, liver, pancreas and associated secretions, including the digestion and absorption of carbohydrates, proteins, lipids, vitamins, minerals and water.
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