Write the function of bio-catalysts/enzymes

It depends on the surface of the levels. the rougher the surface, the greater is the frictional force. for rougher surfaces, you would need to exert greater force to move the object. the concept is that, you must overcome the frictional force in order to bring the object into motion. this is the reason why we add lubricants to the joints so they could easily move. this answer was on

For you to be sure whether it is high pressure in the breathing system or to confirm the percentage of air which is taken in and out by the patient