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Osmosis is the net movement of free water molecules from an area of high concentration to low concentration across a selectively permeable membrane. 

A synapse s a junction between two neurones. Neurotransmitters are relased from one neurone and diffuses across the synapse  to stimulate the next neurone.

1. Sensory neurone detects a stimuli via sensory receptors e.g. a hot pan

2. This sends an impulse up the sensory neuron to the brain or spinal column (together known as the central ...

Structure: The respiratory system starts at the mouth and nose with the pharynx, and continues as the trachea - this is covered with the epiglottis that prevents food and other material entering the lower...

The main difference between the two types of cell is that prokaryotic cells have no (membrane-bound) organelles. This means that the processes that usually happen in organelles take place in the cytoplasm...