b9 Flashcards
what do organisms need energy for
chemical reactions - builds larger molecules
muscle contraction - for movement
keeping warm
what is the difference between aerobic and anaerobic respiration
aerobic respiration uses oxygen
anaerobic respiration does not
write the word equation for aerobic respiration
glucose + oxygen –> c02 + water
write the word equation for anaerobic respiration in muscles
glucose –> lactic acid
why does aerobic respiration release more energy per glucose molecule than anaerobic respiration
oxidation of glucose is complete in aerobic respiration and incomplete in anaerobic respiration
what is anaerobic respiration in yeast cells called
fermentation
write the word equation for anaerobic respiration in plant and yeast cells
glucose –>ethanol + carbon dioxide
how does the body supply the muscles with more oxygenated blood during exercise
heart rate
breathing rate
breath volume increase
what substance builds pin the muscles during anaerobic respiration
lactic acid
what happens to muscles during long periods of activity
muscles become fatigued and stop contracting efficiency
what is oxygen debt
amount of oxygen the body needs after exercise to react with the accumulated lactic acid and remove it from the cells
what is metabolism
sum of all the reactions in a cell or the body
