Unit 6.2 - aerobic and anaerobic respiration

what is aerobic respiration

the use of oxygen to release energy from glucose

what are the waste products from aerobic respiration

water and CO₂

where does glucose come from for aerobic respiration and where does it go

consumed in the diet or broken down from glycogen

stored in the liver

where does CO₂ come from for aerobic respiration and where does it go

enters the blood stream and is transported to the lungs where it is released into the air

where does water come from for aerobic respiration and where does it go

either for the body or is excreted into the kidneys

what are the four stages of aerobic respiration

1. glycolysis

2. link reaction

3. krebs cycle

4. electron transport chain/chemiosis

what is glycolysis

sugar splitting happens i the cytoplasm

one glucose molecule is broken into 2 pyruvate molecules

2 net ATP molecules are made

what happens after glycolysis

the pyruvate molecules is broken down and further converted through link reaction, Krebs cycle and electron transport chain

what are the products of glycolysis

ATP and H₂O

what is the final producs after link reaction, Krebs cycle and electron transport chain

36-38 ATP

6 CO₂

6 H₂O molecules

what is anaerobic respiration

occurs without oxygen and releases less energy but more quickly than aerobic respiration

where does anaerobic repiration happen

animal/yeast cells

2 ATP made

what is the stage used for anaerobic respiration

glycolysis

when does anaerobic respiration happen

in mucels when vigorous exercise requires more energy but not enough oxygen

also called fermentation

what is glucose broken down into in the muscles during anaerobic respiration

lactic acid + energy

what happens when exercise is finished

fast heart rate → transport lactic acid to live cells/muscle

fast breathing → additional oxygen to break down lactic acid

lactic acid converted in muscle and liver cells back to glucose

• used for aerobic respiration

what is oxygen debt

a temporary oxygen shortage in the body tissues arising from exercise

how is oxygen debt repaid

by increasing their respiration rate to break down lactic acid and replenish ATP stores

what does EPOC stand for

excess post- exercise oxygen consumption