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When an action potential from a motor neurone stimulates a muscle cell, a number of things happen to cause sarcomeres (the smallest contracting unit of a muscle cell) to shorten and contract very rapidly....

A number of differences exist between the structure of animal cells and plant cells. The most prominent difference is the presence of both cell walls and cell membranes in plants, while animal cells only ...

Water
Water is obtained from the soil into the roots of the plant. This occurs via osmosis, which is the movement of high water potential to low water potent...

Meiosis occurs to produce haploid gametes required for sexual reproduction. It promotes genetic diversity in 3 different ways: crossing over, independent assortment and random fertilisation.Crossing over ...

Arteries, carrying blood away from the heart have a thick muscular wall that is more elastic than fibrous tissues. This is elastic to cope with the high fluid pressure in the lumen and al...