respiration

• equation for respiration


  C(6)H(12)O(6) +6O(2— 6CO(2)+6H(2)O
• define respiration


  the process used by all organisms to release the energy they need from food
• is respiration exothermic or endothermic


  exothermic
• what do you need energy for


  make muscles contract, transport substances around the body and keep bodies warm
• aerobic respiration


  occurs in mitochondria

  is 19x more efficient

  needs glucose and oxygen and produces cO2 and water

  32 atp molecules released
• anaerobic respiration


  occurs in cytoplasm

  needs glucose

  produces lactic acid

  releases 2 ATP molecules
• uses for anaerobic respiration in microorganisms 


  fermentation-bread+alcohol
• heart rate increases as….

  as it increases the flow of oxygenated blood and glucose to respiring cells in muscles
• breathing rate increases as

  as it increases the rate of oxygenated blood by bringing more air into the lungs
• breath volume 


  increases as it brings in more air into the lungs so increased rate if oxygen into the blood
• glucose level


  increases (converted from glycogen) as it increased the supply of fuel/ increases the supply of respiration substrate
• 9 steps

  1. vigorous exercise
  2. heart and lungs cant supply oxygen fast enough
  3. aerobic provides less and less energy
  4. anaerobic begins to supply energy
  5. glucose is broken down into lactic acid
  6. lactic accumulates in the muscles
  7. forced to stop exercise and the lactic acid is transported to the liver
  8. it is oxidised into CO2 and water
  9. oxygen debt is repaid
• metabolism def


  any and every chemical reaction that happens in the body
• catabolic definition


  breaking dow eg. respiration
• anabolic definition


  building up eg. protein synthesis