Anaerobic Respiration Flashcards
is energy included in the respiration equations?
no
what is anaerobic respiration?
cells that respire without using oxygen
why is less ATP produced in anaerobic respiration?
the glucose is not completely broken down
what does anaerobic respiration also produce?
toxic waste products which must be excreted or broken down (otherwise they build up and kill cells)
what is an advantage of anaerobic respiration?
it allows cells to obtain cells a small amount of usable energy even when oxygen supply is limited
in what kingdoms does anaerobic respiration produce ethanol and carbon dioxide?
fungi and plants
anaerobic respiration word equation (in fungi and plants)
glucose -> ethanol + carbon dioxide
why is anaerobic respiration useful in food production?
- we use yeast in bread and alcohol production
- in both processes we supply glucose and keep the yeast in low oxygen conditions so that the cells anaerobically respire
- the carbon dioxide produced forms bubbles in bread dough, causing it to rise
- the ethanol provides the alcohol content in beer and win
in what kingdom does anaerobic respiration produce lactic acid?
animal
what is oxygen debt?
the volume of oxygen needed to oxidise the lactic acid
where does anaerobic respiration occur in animals?
- in muscle cells when there is a shortage of oxygen e.g. during intensive exercise
- if the muscles are worked very hard they need large quantities of energy, more than can be provided by aerobic respiration
- the glycogen stored in muscle cells is broken down by glucose
- this is respired anaerobically providing an additional energy supply
what happens when lactic acid builds up?
- it causes cramps, and diffuses from muscles into the blood
- in high concentrations lactic acid is toxic, so it is transported to the liver where it is oxidised
- this uses oxygen - we keep breathing heavily after exercise to supply the extra oxygen needed to dispose of the lactic acid in our bodies
