question archive Receptor, afferent neuron, interneuron, efferent neuron and effector
Receptor, afferent neuron, interneuron, efferent neuron and effector
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Receptor, afferent neuron, interneuron, efferent neuron and effector.
A reflex arc can be considered a 'short cut' in the nervous system. It bypasses the brain for a quick response. The components are (see also image):
1)Receptor: a specialized part of a neuron that receives a signal.
2)Afferent neuron: a neuron that transmits the signal to the spinal cord.
3)Interneuron: a neuron in the spinal cord that connects input to output.
4)Efferent neuron: a neuron that transmits the signal to the effector.
5)Effector: the tissue that turns the signal into action, usually a muscle.
Examples are withdrawing your hand when you touch something hot, or the knee jerk reflex.
