Energy Systems Flashcards
What is ATP
Direct source of energy for all energy requiring processes
In all cells
Consists of a number of atoms held together by high energy bonds. When broken, energy is released
ATP system
- Energy required
- Enzyme ATPase released which initiates ATP breakdown
- outermost bond broken
- ADP + inorganic phosphate + energy
SOME ENERGY GIVEN OFF AS HEAT: EXOTHERMIC
ATP LIMITATIONS
Limited supply in muscle cell
4 fuels for atp resyntheis
Proteins
Phosphocreatine
Glycogen
Triglycerides
Pcr sources
Red meat
Fish
Glycogen sources
Complex carbs
Pasta
Porridge
Why is breakdown of fat used at rest to supply energy
Can provide more energy per gram than glycogen but requires 15% more o2 to metabolise
Why must triglycerides be used in conjunction with glycogen during aerobic exercise
Transport of fatty acids in blood is poor and slow due to their low solubility, thus they do not arrive at muscle in sufficient quantities to sustain contraction
When are proteins used for atp resynthesis
When o2 is present and glycogen stores are low
What are fatty acids
The component of fat used for energy production
What energy systems are used for intense activity
ATP/ PC (alactic)
Lactic acid (lactate)
What fuels are used in aerobic system
Fats (triglycerides)
Muscle glycogen
Proteins
What is the sarcoplasm
Fluid which surrounds the nucleus of a muscle cell that is the site for anaerobic and aerobic energy pathways
