Search over 10,000 free study notes

A synapse is the fluid filled gap between the presynaptic neuron and postsynaptic neuron. 1) An electrical impulse travels along an axon of the presynaptic neuron. 2) When the impulse reaches the nerve-en...

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...