What prevents the entry of food into the larynx during deglutition?
1. A thin elastic cartilaginous flap
2. A thick fibrous cartilaginous flap
3. A thick elastic cartilaginous flap
4. A thin calcified cartilaginous flap

Subtopic:  Respiratory System: Upper Respiratory Tract |
 81%
Level 1: 80%+
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Air conditioning – warming, humidifying and filtering of the air, is the function performed by:

1. oral cavity 2. nasal cavity
3. pharynx 4. larynx
Subtopic:  Respiratory System: Upper Respiratory Tract |
 85%
Level 1: 80%+
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Phonation is the function of:

1. Larynx 2. Pharynx
3. Muscles of lips and tongue 4. Sinuses in the bones
Subtopic:  Respiratory System: Upper Respiratory Tract |
 73%
Level 2: 60%+
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The middle ear cavity is connected to the nasopharynx by:

1. auditory tubes 2. internal nares
3. nasolacrimal ducts 4. paranasal sinuses
Subtopic:  Respiratory System: Upper Respiratory Tract |
 53%
Level 3: 35%-60%
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