BBC Bitesize - GCSE Biology (Single Science) - Respiratory system - Revision 4
This factsheet explains how exercise affects the lungs, how breathing is influenced will require less oxygen to move and they will produce less carbon dioxide. quency of the exercise as well as the environ- . oxygen uptake and carbon dioxide output. . there is a relationship between capillary density and ˙VO2max. When we exercise vigorously, the cells need more oxygen and produce .. This is a measure of the relationship between carbon dioxide produced and oxygen.
Your body constantly needs energy for basic operations such as your heart beat and digestive system, which means carbon dioxide is always being produced as well. However, as you exercise, you significantly increase the energy needs in your body as your muscles work at an accelerated and more intense pace.
Increase in Oxygen To create new energy, oxygen must be present in the bloodstream.
The more energy being used through exercise, the more oxygen is needed to create new energy. To meet these needs, your body initiates an increase in both your respiratory rate and your heart rate. The increased respiratory rate increases how much oxygen is inhaled into the lungs and transferred into the bloodstream.
The increased heart rate speeds up how quickly oxygen can be transported to the cells for energy creation. Carbon Dioxide Production Once oxygen makes it to the needy cell, it's combined with broken-down nutrients from the foods you've recently consumed and created into energy through a process called aerobic respiration.
However, as the cell creates energy, it also creates byproducts of heat, water and carbon dioxide. While the excess heat is used to maintain body temperature or is released from the body through sweat, the water exits the body through urine, sweat or through your breath.
Gas Exchange During Exercise During exercise, your body needs more energy, which means your tissues consume more oxygen than they do at rest. Consuming more oxygen means you will also produce more carbon dioxide because your metabolic rate is elevated. The ratio of carbon dioxide produced per oxygen consumed also increases during exercise because a shift from fat to carbohydrate utilization takes place.
- What Effect Does Exercise Have on the Amount of Carbon Dioxide You Release?
- Your lungs and exercise
- Coupling of ventilation and CO2 production during exercise in children.
At the most challenging work rates, you burn carbohydrates exclusively and produce 1. Non-Metabolic Carbon Dioxide At rest and during moderate exercise, lactic acid will not increase in your muscles because all that is produced is also used.
Your lungs and exercise
Once you reach more challenging work rates, production exceeds use and the acid enters your blood. To maintain a healthy pH, sodium bicarbonate in your blood buffers most lactic acid by breaking it down to water and carbon dioxide. This results in additional carbon dioxide that must be released by your blood. Example When you jog at 6 mph, you require If this is a very challenging pace.
Your muscles will burn carbohydrates exclusively and produce This equates to 3 liters of carbon dioxide each minute for a pound person sustaining that pace. The challenging exercise would also result in lactic acid accumulation and subsequent buffering to carbon dioxide.