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Muscle cells are present in the stomach wall so that they can contract and move the food. This aids digestion and the action of enzymes

The movement of molecules from an area of high concentration to low concentration across a membrane using energy.

Metabolic rate is the speed at which chemical reactions take place in our bodies

- Running through past exam papers

- Reading, memorising, and re-writing

- Taking regular breaks

There are two main reasons that smoking can increase blood pressure:

1. Cigarette smoke contains nicotine which, once inhaled, can enter the bloodstream and cause the release of ...