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Biomedicine 1 - lecture notes on electrical properties £8.96   Add to cart

Lecture notes

Biomedicine 1 - lecture notes on electrical properties

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Accurate and concise lecture notes on electrical properties of cells in relation to dentistry. Includes coloured diagrams and images Thorough explanations and definitions of key terms.

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  • May 23, 2024
  • 4
  • 2023/2024
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hanifaahmed
Lesson 6: Electrical properties

Action Potentials
- Membrane contains voltage gated channels
- They all respond to depolarisation
- Influx of sodium ions
- When the channels are open, they are fast to close
- Action potentials are of a fixed amplitude
- Potassium ion channels are slower to open compared to sodium
- Potassium ions channels bring the potential back to resting rate




Different excitable tissues have different Aps
- Retinal ganglion cell - 100mv
- Cardiac monocyte - 100mv
- Pancreatic beta cell - 60mv

Speed of action potential
- Higher temperature the faster
- Larger size the faster
- More myelination the faster
- Disease eg, MS slows down transmission

Myelination
- Nodes of ranvier increase conduction
- Saltatory conduction

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