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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.

Institution
Kings College London (KCL)
Course
Dental Hygiene and Therapy








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Institution
Kings College London (KCL)
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Dental Hygiene and Therapy
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Uploaded on
May 23, 2024
Number of pages
4
Written in
2023/2024
Type
Class notes
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All classes

Subjects

  • healthcare
  • cells
  • dna
  • protiens
  • anatomy
  • physiology
  • dental hygiene
  • dental therapy
  • electrical properties
  • dentistry

Content preview

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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