Nervous system receptor, mechanoreceptor
Responds to mechanical stimuli
Pressure
Deep in skin + joints
Neuron end wrapped in connective tissue layers (lamellae)
Cell-membrane has special stretch-mediated sodium channels
Open Na+ ions when stretched
Pressure stimulus pushes lamellae:
Deforms sensory neuron membrane
Opens stretch-mediated Na+ ion channels
Diffuse in, depolarising
Create generator potential
Greater pressure opens more Na^+ channels
Threshold potential reached, action potential is initiated
Impulse move to sensory neuron
