Strength of inspiration and expiration can be increased with the help of_______

Cigarette smoking causes______________

Contraction in diaphgram causes increase in thoracic volume in the _____

Chloride shift occurs in response to _____

Inspiration occurs when there is _______

What is the concentration of oxygen in expired air?

Bulk of carbon dioxide is transported by ______

____ prevents the food from entering into the glottis during swallowing.