93246
Beschreibung
Karteikarten von alexlpeart, aktualisiert more than 1 year ago
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Erstellt von alexlpeart
vor etwa 11 Jahre
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| Frage | Antworten |
| Define tidal volume. | Volume of gas inhaled and exhaled in one respiratory cycle. (0.4-1.0L) |
| Define vital capacity | Max volume of air that can be expelled from the lungs from full inspiration. |
| Give the equation for working out pulmonary airflow capacity. | Expiatory volume/vital capacity |
| Give a reason why respiratory factors cant be a limiting factor. | We can our breathing rate at VO2 max is 25% less than our maximal breathing rate. |
| Women have _____ lung function measurements than men. This means that ... | They have to work harder to maintain adequate alveolar to arterial O2 exchange. They might enter hypoxaemia earlier than men. |
| As ventilation increases it becomes _____ costly in terms of O2 uptake. | more |
| Define minute ventilation. | the volume of air breathed each min. |
| Explain what happens to depth and rate of breathing as we exercise. | Depth increases more than rate, then both depth and rate increase. Athletes may reach up to 60 breaths per min |
| define the ventilatory breakpoint. | the point during intense exercise at which ventilation increases disproportional to the O2 consumption. |
| Give some evidence to explain why ventilatory breakpoint isn't caused by acidosis. | Mcardles patients still experience a ventilatory breakpoint. |
| Give some evidence to suggest why ventialtion isn't linked with muscle metabolites. | When metabolites trapped in cell by applying a tight cuff to the muscle breathing rate still fell after exercise. |
| What is the primary drive for respiratory control? | Higher brain control, e.g. efferent copying. |
| Explain why arterial hypoxaemia may occur in some elite athletes. | Hypoxaemia is where we have low oxygen content in the arterial blood. In elite athletes this may be due to insufficient ventilation or inadequate blood flow to the lungs. |
| Give a reason as to why exercise increasing our blood thickness wont effect oxygen delivery to the muscles. | Increasing blood thickness mean the hematocrit concentration will increase which will balance the effect of thick blood. |
| Explain why CO2 doesn't ever build up in arterial blood, even in elite athletes. | CO2 molecule is much smaller than O2 and therefore can pass our of the lungs much more easily. |
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