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Extra:
B9.Summary (Peas
Test (Respiration
Live,soaked peas vs. Dry…
Extra:
B9.Summary
Peas
Test
Respiration
- Live,soaked peas vs. Dry peas
vs. Boiled, soaked peas
- Live peas start to grow, respire aerobically
- Small Energy trans. to surroundings etc.
- Warming peas, flask temp. rises
Dry Peas
- Dry, not growing, no respire
- No energy transferred
- No warming Effect
Room Temperature
- As a control
- See if change in flask temp
linked to room temperature change,
dismissing warming effect
Boiled Peas
- Dead, no respire
- no energy transfer
- No warming effect
Boiled Peas Anomaly
- Peas go mouldy
- mould starts respiring
(not strictly an anomaly)
- or sun on thermometer,
poor reading
Aerobic
vs. Anaerobic
Aerobic
- Glucose breakdown in cell w/ O2
- Releases energy for cellular use
- CO2, H2O waste products
Anaerobic
- Glucose breakdown in cell w/o O2
- Release smaller energy amount for cell
- Lactic acid waste product
Human vs. Yeast: Anaerobic
- Human waste = lactic acid
- Yeast waste = Ethanol, CO2
Oxygen debt
- O2 amount needed
- To convert lactic acid from an. exercise
- To CO2 + To H2O
Aerobic
Benefits
Aerobic vs. Anaerobic
- Aerobic releases more energy
- Muscle contract more efficiently
- Athletes prolong switch to less efficient
anaerobic respiration
Altitude Training
- RB cells carry O2 to tissues
- More RB cells supply more O2
- Prolong aerobic, muscles work more
effectively for long
Blood Doping
- Incr. RB cells in body, better
performance
- Allow more O2 to be carried
to working muscles,
prolong use of efficient
aerobic respiration
Lack of Glucose and Oxygen
- Muscles start anaerobic respiration
- Glucose partially broken into lactic acid
- Lactic acid builds up in muscle cells,
may cause muscle fatigue
- Less energy release
Fit vs. Unfit
Heart & Lungs
- Heart, breathe rate incr. w/ exercise
to bring more O2 into body
- Heart and lung capacity bigger in fit
- Heart, breathe rate incr. less for fit,
can bring more air in, pump more O2 blood
round body w/ each breath & heartbeat
Muscles
- Bigger muscles, better blud supply than unfit
- Contract more efficiently, aerobic for longer
Oxygen Debt
- Fit builds smaller debt, builds smaller debt,
w/ same exercise; repays O2 debt faster,
bringing more O2 into body more quickly
Exercise
Heart benefits
- Heart has greater volume
- Pumps more blood each beat
- Beats more slowly at rest
Lungs benefits
- Bigger lungs (better blood supply)
- More efficient gas exchange