Describe what happens to ATP/CP levels during recovery from exercise.

Pressure in gases is caused due to the random movements of gas particles in all directions. As the gas particles move around, they collide with the walls of the container containing the gas. These collisions exert a force on the surface area of the container, creating pressure. The pressure exerted by the gas increases as the number of gas particles or their speed increases. Therefore, pressure in gases can be understood in terms of the movement and collisions of gas particles.