A minimal amount of pleural fluid present in the pleural cavity:
1. | provides a medium for the exchange of respiratory gases |
2. | reduces friction between the visceral and parietal pleurae |
3. | provides lubrication for movements of the diaphragm |
4. | permits the exchange of electrolytes during respiration |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyDuring deglutition, the food is prevented from entering into the larynx by the cartilaginous:
1. epiglottis | 2. glottis |
3. aryepiglottic fold | 4. laryngeal prominence |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe trachea divides into a right and a left primary bronchus at the level of:
1. 2nd thoracic vertebra | 2. 3rd thoracic vertebra |
3. 5th thoracic vertebra | 4. 12th thoracic vertebra |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe alveoli are lined with:
1. Simple cuboidal epithelium
2. Pseudo-stratified columnar ciliated epithelium
3. Transitional epithelium
4. Simple squamous epithelium
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe conducting part of the human respiratory system is not involved in:
I. clearing inhaled air from foreign particles
II. humidifying the exhaled air
III. bringing the air to a temperature higher than body temperature
1. Only I | 2. Only II and III |
3. Only I and II | 4. I, II and III |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyI: | P is an incomplete cartilaginous ring seen only in trachea and principal bronchus. |
II: | Q is the point where the trachea divides into a right and left primary bronchus and corresponds to the level of 5th thoracic vertebra. |
III: | R shows the double-layered pleura where the outer pleural membrane is in close contact with the thoracic lining. |
IV: | S is pleural cavity with minimal amount of pleural fluid which reduces friction on the lung surface. |
1. Only I, II and III | 2. Only I, III and IV |
3. Only II, III and IV | 4. I, II, III and IV |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIt is necessary that lungs must be present in anatomically air-tight chamber because:
1. we cannot directly alter the pulmonary volume
2. our lungs are not made of any elastic tissue
3. the pleural cavity always has a positive pressure with respect to pulmonary pressure
4. the partial pressure of oxygen in atmosphere is less than that in the alveoli
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyDuring expiration, the diaphragm and external intercostal muscles are:
1. contracted
2. relaxed
3. flexed
4. both relaxed (diaphragm) and flexed (intercostal muscles)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA measure of the amount of air a person inhales during a normal breath is:
1. inspiratory reserve volume | 2. vital capacity |
3. total lung capacity | 4. tidal volume |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe amount of air that remains in a person's lungs after fully exhaling is known as:
1. tidal volume | 2. expiratory reserve volume |
3. vital capacity | 4. residual volume |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology