Which of the following is the function of the conducting part of the respiratory system?
1. clears the foreign particle
2. humidifies air
3. brings air to body temperature
4. All of these
Trachea divides at the level of ______thoracic vertebra into left and right primary bronchi
(1)5th
(2)6th
(3)10th
(4)4th
Lungs are covered by a double layered membrane which is called
1. Pleural membrane
2. visceral membrane
3. pulmonary membrane
4. parietal membrane
How many external nostrils are present in human beings
1. 1
2. 2
3. 3
4. None of these
Which of the following is true about epiglottis
1. thin elastic cartilaginous flap
2. prevent food entry into larynx
3. Coughing occurs due to its improper movement
4. All of these
Trachea divides into two right and left primary bronchi at the level of:
1. Seventh cervical vertebra
2. Third thoracic vertebra
3. Fifth thoracic vertebra
4. Seventh thoracic vertebra
Which of the following is not supported by cartilaginous rings
1. Primary bronchioles
2. tertiary bronchioles
3. tracheae
4. alveoli
Which of the following is true about pleural membranes except
1. outer pleural membrane is in close contact with the thoracic lining
2. inner pleural membrane is in contact with the lung surface
3. pleural fluid is present between them
4. It increases friction on the lung surface
Which of the following constitute the exchanging part of the respiratory system
1. external nostrils to trachea
2. external nostrils to primary bronchioles
3. Respiratory bronchioles to alveoli
4. external nostrils to terminal bronchioles
The common passage for food and air is
1. nasal passage
2. nasopharynx
3. oropharynx
4. pharynx