In the mass on a spring system: The period of oscillation DOES depend on the mass according to the equation: T = 2*pi*sqrt(m/k) T = period pi = 3.14 m = mass k = spring constant (i.e. how stiff the spring is) It DOES NOT depend on the length of the spring (which is why you don't see it in the above equation).
Pulmonary gas exchange takes place in the lungs between the alveoli and the blood. It is also referred to as âexternal respirationâ as it involves the respiratory processes that have contact with the external environment.
1 gas exchange is the ventilation of gases to and from the body cells of an animal so cellular respiration can take place. 2  gas exchange surfaces provide an area for gases to be exchange between the medium (air or water) and body cells, usually enclosing a moving blood supply. gas exchange is the ventilation of gases to and from the body cells of an animal so cellular respiration can take place. 2  gas exchange surfaces provide an area for gases to be exchange between the medium (air or water) and body cells, usually enclosing a moving blood supply.