Reflex arc
Example - pain withdrawal reflex

Receptors detect a stimulus; receptors can be sensory cells or nerve endings of sensory neurons (i.e. pain receptors are nerve endings of sensory neurons)
Sensory neurons carry impulses from receptors to the central nervous system (spinal cord or brain); the impulse travel to ends of sensory neurons where there are synapses with relay neurons. Messages are passed by synaptic transmission.
Relay neurons receive messages across synapses from sensory neurons, and pass them to the motor neurons that can cause the appropriate response
Motor neurons receive messages across synapses from relay neurons and carry them to an effector
Effector (e.g. muscle fibers) to carry out a response after receiving a message from a motor neuron; effectors can be muscles which respond by contracting, or glands, which respond by secreting

	Creado por rangdias hace alrededor de 10 años

Biology HL Apunte sobre Option E: Neurobiology and Behavior, creado por rangdias el 04/03/2014.