respiration GCSE Flashcards
what is cellular respiration
an exothermic reaction that occurs continuously in the mitochondria
what do organisms need energy for
chemical reactions to build larger molecules, muscle contraction for movement, keeping warm
what is aerobic respiration?
Uses oxygen
What is anaerobic respiration?
Without oxygen
Word equation for respiration
glucose + oxygen = Carbon dioxide+ water
what equation for anaerobic respiration in the 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 compared to anaerobic respiration
What is anaerobic respiration in yeast cells?
fermentation
Word equation for anaerobic respiration in plant and yeast cells
glucose = ethanol + carbon dioxide
how does the body supply the muscles of more oxinated blood during exercise?
heart rate, breathing rate and breath for you increases
what substance builds up in the muscles during anaerobic respiration
lactic acid
what happens to muscles during anaerobic respiration
muscles become fatigued stop contracting efficiently
what is oxygen debt
the amount of oxygen the body needs after exercise to react with the increased amount of lactic acid to remove it from the cells
how is lactic acid removed from the body
lactic acid in muscles goes to blood transports to the liver then the lactic acid converts back to glucose
what is metabolism
sum of all the reactions in a cell of the body
