mr smith-energy systems Flashcards
what does body do when we exercise
energy produced from food converts into energy for muscle contractions to allow movement
energy used from muscle contractions comes from ATP
ATP
adenosine triphosphate
only usable form of chemical energy in body
how does food we eat turn to ATP
food we eat
broken down to release energy to form ATP
energy stored in ATP is released by breaking down bonds that hold compound together
what do enzymes do
break down compounds
Atpase is compound to break down ATP leaving ADP
how does the body rebuild ATP
convertig ADP and Pi back into ATP
what are the three ways we can resynthesise ATP
Aerobic system
ATP-pc system
anaerobic glycotic system
which energy system are they likely to use for higher intensities
anaerobic glycotic energy system
atp-pc system
which energy system likely to use for lower intensities
aerobic
aerobic energy system
used when intensity is low, oxygen supply high
breaks down glucose into carbon dioxide and water
what are the three stages of the aerobic energy system
glycolysis
Krebs cycle
electron transport chain
what happens at the first stage of aerobic energy system
glycolysis-break down of glucose to pyruvic acid
its anaerobic so takes place in sarcoplasm of muscle cell
ATP-pc system
atp broken down by enzyme atpase into adp and pi and energy
this energy transferred to kinetic energy for movement
phosphocreatine in sarcoplasm broken down by enzyme creatine kinase to make phosphate + creatine + energy
ADP + PI + energy= resynthesis of ATP
coupled reaction and no delay for 02 as all already in cell
advantages of ATP-PC system
made in sarcoplasm which uses high intensity
no fatiguing by-products are produced
weakness of ATP-PC system
only lasts 8-10 seconds
exothermic reaction
when energy is released
