1.8 Arteriovenous Oxygen difference Flashcards
1
Q
what is arteriovenous oxygen difference
A
the difference in the volume of oxygen between the arteries and the veins
2
Q
why do you want a high difference
A
muscles have absorbed the most oxygen possible for respiration
3
Q
ideal situation
A
- high extraction from the blood
- oxygen used for energy release
- so no fatigue and by products so grater endurance
- high A-VO2 diff
4
Q
how is a high A-VO2 diff achieved
A
high diffusion rate
5
Q
A-VO2 difference in trained athletes
A
- trained athlete works at a higher intensity aerobically because they have a higher A-VO2 diff
6
Q
how is a higher A-VO2 diff achieved
A
- training at an aerobic capacity
- higher temperature
- effective warm up
- lower blood pH (Bohr Shift)
7
Q
long term cardiac effects for A-VO2 diff
A
- myocardial hypertrophy
- greater resting stroke volume
- greater max cardiac output
- increase in exercise heart rate range
8
Q
long term vascular effects of higher A-VO2 diff
A
- increase RBC (haematocrit)
- increase in blood plasma
- increase in strength of smooth muscles
- capillarisation (more capillaries)
