Topic 28 Flashcards
1
Q
What is the resistnace of an axon?
A
Resistance of the cell membrane os higher than intra/extracellular fluid.
Membrane is a bad conductor compared with fluids.
2
Q
Describe capacitance of an axon
A
Tissues have electric capacity, impedance can be used to obtain physiological conditions
3
Q
Describe the harmful physiological effects of electic currents
A
Harmful between 30-300 Hz
House hold between 50-60 Hz
10 mA → Muscle Contraction
80 mA → Heart Arythmy
100 mA → Fibriliation
>100 mA → Stop the heart
4
Q
Give the equation of Ohm’s Law
A
- I = Current*
- U = Potential Difference*
- R = Resistance*
