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An inactive form of the pathogen is injected into the body. The body detects the antigens on the surface of the pathyogen and this triggers the white blood cells (lymphocytes) to produce antibodies to com...

Individual neurons do not physically touch but are connected by synapses. These are small gaps between neurons. Signals or information are passed over the synapse between neurons, which allows information...

A reflex is an involuntary response to a sensory stimulus. The pathway of neurones involved in a reflex is known as a reflex arc. A reflex arc - such as quickly moving your hand away from a hot flame - in...

A receptor detects the stimuli and converts it into an impulse and an effector converts the impulse into an action. An example of a receptor is a light receptor in the eye which detects changes in light i...

the relfex action consists of receptor and neurons communicating together. the brain is not involved the processing of this action. The basic pathway that the reflex arc follows is: stimulus (touching som...