Which of the following structure is present inside the larynx of the respiratory system?
 a) Glottis          b)   Epiglottis                c)   Vocal cords        d)  None of these

Which of the following respiratory organs are present in spiders and scorpions?
 a) Book lungs             b) Gills               c) Gill books             d) Lungs

Nasopharynx opens through the …A… of the larynx region into the …B…
Choose the correct option for A and B to complete the given NCERT statement
 a) A-trachea, B-lungs         b)    A-trachea, B-glottis        c)    A-glottis, B-lungs       d) A-glottis, B-trachea

When temperature decreases oxyhaemoglobin curve will become
 a) More steep           b) Straight             c) Parabola         d) All of these

Skin is an accessory organ of respiration in
 a) Human             b) Frog               c)  Rabbit               d)   Lizard

At which thoracic vertebra does trachea divide into right and left primary bronchi?
a) 5             b) 6                   c) 9                   d) 4

The partial pressure of oxygen in the alveolar air is 
 a) 45 mm Hg               b) 95 mm Hg                    c) 104 mm Hg              d) 110 mm Hg

Inspiration is initiated by
 a) Extension of the diaphragm        b)    Contraction of the diaphragm
 c) Extension of the lungs                d)    Contraction of the lungs

During normal respiration without any effort the volume of air inspired or expired is called
 a) Tidal volume          b) Reserve volume          c) Residual volume              d) None of these

Identify the different parts of the respiratory system in accordance to their location given below
I. Posterior part of the pharynx
II. Present at the glottis
III. In front of oesophagus
Choose the correct option accordingly
 a) I-Nasal cavity, II-Larynx, III-Bronchi    b) I-Nasopharynx, II-Epiglottis, III-Wind pipe
 c) I-Glottis, II-Larynx, III-Trachea            d) I-Larynx, II-Epiglottis, III-Trachea

What is vital capacity of our lungs?
 a) Inspiratory reserve volume plus tidal volume
 b) Total lung capacity minus expiratory reserve volume
 c) Inspiratory reserve volume plus expiratory reserve volume
 d) Total lung capacity minus residual volume

Left shift of oxyhaemoglobin curve is noticed under
 a) Normal temperature and pH                       b)    Low temperature and high pH
 c) Low pH and high temperature                    d)    Low pH and low temperature

Carbonic anhydrase is found in
 a) Blood              b) Plasma              c) Both (a) and (b)             d)    None of these

Which is called Hamburger shift?
 a) Hydrogen shift                   b) Bicarbonate shift                     c) Chloride shift                      d) Sodium shift

 Hiccups can be best described as
 a) Forceful sudden expiration         
 b) Jerky incomplete inspiration
 c) Vibration of the soft palate during breathing    
 d) Sign of indigestion

Dead space air in man is
 a) 500 mL               b) 150 mL                  c) 250 mL                d) 1.5 mL

Human beings have a significant ability to maintain and moderate the respiratory rhythm to suit the demands of the body tissues. This is achieved by
 a) Arterial system                          b)    Systemic vein system
 c) Neural system                           d)    Cardiac system

Identify which respiratory structure possesses the following features and choose the correct option accordingly
I. Found in mammals
II. Highly muscular and fibrous partition, elevated towards the thorax like a dome
III. Separates thoracic and abdominal cavity
 a) Pleural membrane            b) Phrenic muscle                    c) Diaphragm                d) Mediastinum

Haemoglobin is having maximum affinity with 
 a) Carbon dioxide                      b) Carbon monoxide               c) Oxygen                 d) Ammonia

Arrange the given steps of expiration in the sequence of event occurring first
I. Relaxation of the diaphragm and sternum
II. Reduction of the pulmonary volume
III. Expulsion of air from the lungs
IV. Increase in intra pulmonary pressure
Choose the correct option
 a) I → II → III → IV        b)    I → II → IV → III    c) IV → III → II → I       d) IV → II → III → I

Factors affecting the rate of diffusion is/are
 a) Pressure gradient                             b) Solubility of gases
 c) Thickness of membranes                 d) All of these

Tobacco smoke contains carbon monoxide, which 
 a) Reduces the oxygen-carrying capacity of blood                 b) Causes gastric ulcers
 c) Raises blood pressure                                                        d) Is carcinogenic

Which of the following diseases are occupational respiratory disorders?
 a) Silicosis, fibrosis and asbestosis         b)    Emphysema and mountain sickness
 c) Asthma and emphysema                    d)    Asthma and AIDS

In humans, exchange of gases occurs
 a) By diffusion    
 b) Between blood and tissue
 c) Between alveoli and pulmonary blood capillary    
 d) All of the above

About 1200 mL of air is always known to remain inside the human lungs. It is described as
 a) Inspiratory reserve volume        b)    Expiratory reserve volume
 c) Residual volume                       d)    Tidal volume

Exchange of gases in man takes place in
 a) Trachea          b) Bronchus                      c) Alveoli               d) All of these