Part 1 Flashcards
What are the key features of O2?`
Abundance and Electronegativity
How is biocomplexity linked with atmospheric oxygen?
Increases in atmospheric oxygen is associated with an increase in organism complexity
Polar Gigantism
Trend of animals to be larger at higher latitudes and smaller at higher altitudes and there is a correlation between maximum body length and oxygen content (Benthic amphipod crustaceans)
Insect Gigantism
Rise and fall in atmospheric oxygen coincide with the rise and fall of the size of insects
Oxygen In corporation into Membrane Proteins
Eukaryotic cells with compartments
Romer’s Gap
15-million year decline in vertebrate colonization (fossil records)
Climate Change
Warming - increases oxygen metabolism and decreases it’s solubility in water
What is the aetiology of complex diseases closely associated with?
Oxygen Metabolism
VO2 Max (Maximal oxygen uptake)
Maximal rate of oxygen utilization by exercising muscles
How is VO2 Max measured?
Exercise stress test
Why do you test for VO2 max?
Assess physical fitness, diagnosing and assessing IHD, developing an exercise prescription, and identify patients who may have difficulty performing various functional tasks.
What is VO2 max associated with?
Muscle strength
T or F : VO2 increases with age
F - it decreases with age, about 1% per year after 30 years
What are determinants of endurance performance
VO2max, Capillary density, Level of aerobic enzymes, mitochondrial size and number, muscle fibre type
What does VO2 max represent?
A fundamental measure of physiologic functional capacity for exercise
Maximal oxygen consumption tests
Treadmill, running, walking, swimming, rowing, skating
How long do consumption tests usually last?
3-5 minutes supramaximal effort or progressive increments of effort - termination of test influenced by motivational factors that do not necessarily reflect physiological strain