respiratory system

AS respiratory system
What I is the process by which gaseous exchange occurs between the bloodstream and the muscle cells?. What E is the process by which gaseous exchange occurs between the bloodstream and the alveoli?. What D is cuased by different partial pressures of the gases involved in respiration?. What L builds up during exercise and contributes to lowering the pH level of blood?. What P does PO2 mean?. What C detect changes in blood acidity levels and then stimulate an increase in breathing rate?. What P are receptors in the muscles and joints which detect movement and can increase ventilation? . What R is an area in the brain responsible for controlling breathing rate and depth?. What M is the area in the brain in which the respiratory centre is located?. What N is the system for controlling ventiliation with proprioceptors in the joints and muscles?. What C is the system for controlling ventilation by detecting changes in CO2 levels?. What O decribes haemoglobin when it is carrying oxygen?. What M is the equivilent to haemoglobin but located inside the muscles?. What M is the structure inside the muscle cells where oxygen is transported to?. What N is makes up 79% of air in the atmosphere?. What O is a gas that makes up 20% of inspired air but only 16% of expired air?. What C is is a gas that makes up 0.04% of inspired air but 4% of expired air?. What S is a piece of equipment which could be used to measure lung volumes and capacities? . What T is a lung volume which increases during exercise?. What I is a lung volume which decreases during exercise?.
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