B9 respiration Flashcards
aerobic respiration equation
glucose + oxygen -> CO2 + water
C6 H12 O6 + 6 O2 -> 6 CO2 + 6 H2 O
need for respiration
synthesis reactions
muscle contractions in animals
maintain body temp
used in active transport (root hair cells)
responses to exercise
increased heart rate, breathing rate and volume
glycogen stores converted to glucose for cellular respiration
flow of oxygenated blood to muscles increases
increased rate of removal of waste products from muscles ( CO2)
anaerobic respiration in animals
glucose -> lactic acid
not as efficient as aerobic -> glucose not broken down completely
cause of muscle fatigue
build up of lactic acid in muscle cells
creates oxygen debt
what is oxygen debt
amount of oxygen needed to convert lactic acid back into glucose (in the liver)
anaerobic respiration in plants
glucose -> ethanol + carbon dioxide
energy transferred to environment
metabolism
sum of all the reactions in the body
metabolic reactions
glucose -> starch,cellulose + glycogen formation of lipid molecules respiration reaction photosynthesis reaction glucose + nitrate ions -> amino acids -> proteins
role of liver
detoxifying poisonous substances
passing breakdown products into blood
breaking down old, worn out blood cells and storing iron until needed to make new blood cells
removing lactic acid
use of amino acids
synthesise proteins
breakdown excess proteins to form urea