Explain the differences between the average numbers of mitochondria in the cells shown in Table 1.1.

1 mitochondria are site of aerobic respiration/production of (most of the) ATP ; 2 liver cell/ heart cell, is very active/ use lots of energy /respire more ; 3 e.g. function of liver cell or heart cell ; e.g. active transport/ making enzymes / making bile/ muscle contraction/ heart pumping 4 sperm cells, are active/ swim/ beating flagella ; 5 sperm cells have few mitochondria, as they are small ; 6 red blood cells, full of haemoglobin/ more space for oxygen/AW ; 7 red blood cells, use less energy / do not actively move ;