Flashcards in Energy Deck (14)
The ability or capacity to perform work, and is measured in joules
Define Work, and state the formula used to find its value
A transfer of energy as a consequence of a force acting through a distance
Work = Force x Distance
Define Power, and state the formula used to find its value
The rate of transfer if energy between one system and another
Power = Energy or Work / Time
Describe how the ATP/PC system works
ATP >>> ADP + P(i) + energy
When [ADP] is high, creatine kinase is activiated
CP >>> C + P + energy (exothermic)
This energy is then used to resynthesise ATP (coupled reaction)
ADP + P(i) + energy >>> ATP (endothermic)
Explain how glycolysis in both aerobic and anaerobic respiration occurs
Glycogen >>(GPP - activated by low [CP])>> Glucose-6-phosphate
Glucose-6-phosphate >>(PFK)>> Pyruvic acid + 2ATP
Anaerboic = Pyruvic acid >> Lactic acid
Aerobic = Pyruvic acid goes to the kreb cycle
What are the three stages of aerobic respiration? And where do these occur?
Kreb's Cycle (Matix)
Electron transport chain (Cristae)
Explain the process of the kreb cycle
Acetyl coA + Oxaloacetric acid >> Citric acid
This produces CO2 + Hydrogen atoms + 2ATP
Oxaloacetric acid is reformed
What occurs in the electron transport chain?
NAD + FAD carry hydrogen as NADH + FADH
The hydrogen is then oxidised to form water
The electrons bounce down the chain and form 34ATP
How many ATP are produced if fats are respired?
What is OBLA?
The onset of rapid blood lactate accumulation
What are the thresholds for the 3 different enegy systems?
ATP/PC - up to 12s
Lactic acid - 2-3mins
Aerobic - 3+mins
What are the six factors that affect the predominant energy system?
Exercise intensity / duration
Energy system thershold
Oxygen supply / transport
Food fuel that is avalible
Enzyme activation levels
Explain the Fast Alactacid component of recovery?
ATP+PC and myoglobin stores are replenished
1-4l of O2 needed
30s for half / 2-3mins for full