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Topic 6
Pacinian corpuscle
| Term | Definition |
|---|---|
| Name the 3 receptors | Pacinian corpuscle Rods Cones |
| How can stimuli be detected by cells | Through receptors |
| How can a response be formed | This is through the establishment of a generator potential which can cause a response |
| What stimulus does the pacinian corpsuscle respond to | Pressure change |
| Where are they located | They are located in deep skin and mainly in fingers and feet |
| What does the pacinian copuscle consist of | It consists sensory neurones wrapped with layers of tissue separated by gel The sensory neurone in this also has a special channel protein in its plasma membrane |
| What is inside of the plasma membrane | There is a channel protein which allows the ion transportation and the membranes surrounding the sensory neurones have stretch mediated sodium channels |
| what happens when the channel proteins open | They allow NA+ to diffuse inside the sensory neurone only when they are stretched and deformed |
| Describe what happens when the channels are in resting state | This means the NA+ cannot diffuse inside the sensory neurone due to the channels being narrow. Therefore resting potential is maintained |
| Describe what happens when pressure is applied | The stretch sodium channel opens and Na+ diffuses in which leads to establishment of a generator potential |
Created by:
yHya