Sensory neurones and motor neurones Receptors are cells that detect stimuli - for example, heat, pressure, light. Sensory neurones bring impulses from receptors to the central nervous system (CNS). From there, the impulse may pass on to a motor neurone to be taken to a muscle or gland (the effector). Sometimes there is an intermediate neurone (also known as a 'relay' neurone) within the CNS linking the sensory neurone with the motor neurone. To be able to understand how the impulses are transmitted through a neurone, you must first know what the cell is like at rest.
Sensory neurones and motor neurones Receptors are cells that detect stimuli - for example, heat, pressure, light. Sensory neurones bring impulses from receptors to the central nervous system (CNS). From there, the impulse may pass on to a motor neurone to be taken to a muscle or gland (the effector). Sometimes there is an intermediate neurone (also known as a 'relay' neurone) within the CNS linking the sensory neurone with the motor neurone. To be able to understand how the impulses are transmitted through a neurone, you must first know what the cell is like at rest.