Summary of Human cellular respiration:
(a) Glucose transported to the cell diffuses into the cytoplasm. Glucose is the initial substrate for respiration.
(b) Glycolysis in which glucose with six carbons is broken down into two pyruvate each with 3 carbons. This yields a small amount of ATP.
(c) Anaerobic respiration in which lactic acid is produced, oxidation from glucose yields a small amount of ATP. Remember that anaerobic respiration will occur at the same time as aerobic respiration to provided more energy.
(d) Aerobic respiration in which pyruvate is broken down, oxidised, further in the mitochondria where a lot of ATP is produced.
(e) Oxygen is required for step (d) to be completed. This is transported to the cell on the hemoglobin found inside red blood cells.
(f) carbon dioxide is produced as waste from aerobic respiration it diffuses into the blood and is transported to the lungs where it is excreted in exhaled air.
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