respiration

• exercise increases the bodies energy demands. respiration must increase to meet the increased energy demands
• an increased heart rate delivers more blood (containing glucose and oxygen) to the muscles
• an increased breathing rate increases gas exchange in the lungs with more oxygen taken in and more carbon dioxide released
• blood vessels dilate to ensure more blood reaches the muscles
• an increase in breath volume also increases the rate of gas exchange
• aerobic respiration: oxygen + glucose -> water + carbon dioxide
• anaerobic repsiration: glucose -> lactic acid
• the lactic acid must be broken down by oxygen thats why you breathe heavy after finishing strenuous activity
• respiration is the process by which we free the chemical energy stored in the food we eat so that we can use it for life processes
• in anaerobic respiration glucose breaks down into lactic acid and energy
• anaerobic respiration releases less energy then aerobic