Assertion : Coughing and sneezing are necessary.
Reason : Coughing and sneezing are reflex actions.
Assertion : Most fish when out of water, die of suffocation.
Reason : Atmospheric air contains far less oxygen content than the dissolved oxygen in water.
Assertion : During inspiration, pressure of air falls in the thorax.
Reason : There is a rise in volume of thorax during inspiration.
Assertion : During inspiration, the volume of thorax increases.
Reason : This happens due to the relaxation of diaphragm and inspiratory muscles.
Assertion : Forceful expiration occurs through expiratory muscles.
Reason : Expiratory muscles expires quickly.
Assertion : Vital capacity is higher in athletes than non-athletes.
Reason : Vital capacity is about 3.5-4.5 litres in a normal adult person.
Assertion : Gill-lamellae in aquatic animals help in exchange of gases
Reason : Each gill lamella carries many blood capillaries.
Assertion : In mammals, complex respiratory system has developed.
Reason : Mammalian skin is impermeable to gases.
Assertion : Insects develop a complex system of air tubes called trachea for respiratory purpose.
Reason : Exchange through body surface is not possible in insects.
Assertion : Abdominal muscles is related with respiration in animals.
Reason : Relaxation of abdominal muscles draws in air.