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When a substance that is found that could be potentially useful for treating a disease, it can be developed into a drug. The drug then needs to be tested to check for safety, efectiveness and dosage. The ...

Prokaryotic and eukaryotic organisms have some similar structures: cells membranes (selectively permeable membranes surrounding cells and controlling the entry and exit of materials), cytoplasm (the livin...

Reflex arch is a neural pathway that controls a fast, involuntary reflex. The pathway is as follows: 1)Receptors detect a stimuli such as fire or a neddle pricking your finger. 2) Nerve impulses from the ...

Ventilation means moving air into and out of the lungs. This depends on a number of factors which we can break down and talk about individually.

The structure of the thorax: An airtight space in th...

This is a really common question that people ask actually and I struggled with this when I did GCSE. It's a good idea to jot down the points you want to include whilst you're learning how to answer these ...