The volume of air involved in breathing movements can be estimated by using
1. ECG
2. Sphygmomanometer
3. spirometer
4. Barometer

Which of the following is entirely made of cartilage?

1. Nasal septum

2. Larynx

3. Glottis

4. Trachea

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)5^th
(2)6^th
(3)10^th
(4)4^th

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 bronchi
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