Neuronal Communication

Question 1

Describe the basic structure of a Pacinian corpuscle

Answer 1

Single nerve fibre surrounded by layers of connective tissue which are separated by viscous gel and contained by a capsule

Stretch mediated Na+ channels on plasma membrane

Capillary runs along base layer of tissue

Question 2

What stimulus does a Pacinian corpuscle respond to? How?

Answer 2

1. Pressure deforms membrane, causing stretch mediated Na+ ion channels to open
2. If influx of Na+ raises membrane to threshold potential a generator potential is produced
3. Action potential moves along sensory neuron