8558216
Description
Flashcards by Alice Storr, updated more than 1 year ago
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Created by Alice Storr
about 7 years ago
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| Question | Answer |
| VO2 | The volume of oxygen a person consumes per minute |
| VO2 max | The volume of oxygen a person consumes per minute at their maximum rate of aerobic exercise. Depends on the efficiency of lungs and cardiovascular system when taking up and delivering oxygen and the efficiency that muscles use oxygen |
| Tidal volume | Average volume of one breath |
| Minute ventilation | the amount of air taken into the lungs in one minute. Tidal volume x breathing rate = minute ventilation |
| Vital capacity | The maximum volume of air a person can inhale and exhale |
| Spirometer | Used to study breathing and respiration. Breathing in and out of air in a tank make the levels rise and fall, making a pen on a kymograph produce a trace |
| Residual volume | The amount of air in lungs after complete exhalation (more in emphysema or ashtma attack) |
| Oxygen debt | The increase in oxygen consumption after strenuous exercise (which lead to anaerobic respiration) to convert lactate into CO2 and H2O rather than pyruvate |
| Ventilation centre | In the medulla oblongata that controls breathing. When CO2 levels are high and O2 levels are low it sends impulses every 2-3 seconds to the diaphragm and external intercostal muscles to make them contract (inhalation). Inhibits muscle contraction when stretch receptors send impulses back (exhalation) |
| Stretch receptors (in external intercostal muscles) | Send impulses back to ventilation centre when intercostal muscles have contracted (inhalation) |
| Respirometer | Used to measure rate of oxygen uptake in small organisms |
| Altitude sickness | Control of breathing goes wrong after rise in altitude. Oxygen levels drop so breathing quickens. CO2 levels drop so ventilation centre may stop breathing. Should descend. |
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