Lactic acid fermentation occurs in muscle cells when levels are low. When builds up in muscles it causes pain and muscle fatigue. Usually, the lactic acid diffuses into the bloodstream over time and is filtered out by the and converted into glycogen and then to glucose. However, with proper training, lactic acid can transfer to the of muscle cells, where it is broken apart for its energy. HighLighter PopupUnderline Selected TextGreen Color HighlightOrange Color HighlightYellow Color HighlightBlue Color HighlightPink Color HighlightRemove Color Highlight

Oxygen, Lactic acid, liver, mitochondria

Explanation: Lactic acid fermentation occurs in muscle cells when OXYGEN levels are low. When LACTIC ACID builds up in muscles it causes pain and muscle fatigue. Usually, the lactic acid diffuses into the bloodstream over time and is filtered out by the LIVER and converted into glycogen and then to glucose. However, with proper training, lactic acid can transfer to the MITOCHONDRIA of muscle cells, where it is broken apart for its energy.

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.