Electricity and Neurons

I = V Χ g

I = current (as in amperes)

V = voltage

g = conductance (ability to carry electricity)

{resistance is the opposite of conductance}

If V is held constant, then I is directly proportional to g

If g or V go up, then U goes up

If g or V go down, then I goes down

Also:

V = I/g

If I goes up, V goes up

If g goes up, then V goes down

If I is held constant, then if V goes up, g must go down

If I is held constant, then if g goes down, then V must go up

Ions = current; and they have a certain conductance

Current is commonly carried by Na⁺, K⁺, Cl^- and Ca⁺⁺ in neurons and muscles

Resistors slow movement of electricity (electrons)

Capacitors build up charge; then the charge is discharged quickly when so much accumulates on one side

Batteries store electricity or charge

Cell membranes at rest resist charge (ion) movement, but they do have some leakage of charge

When specific channels open, charge flows, Ex., when Na⁺ channels open, Na⁺ flows down its electrochemical gradient (if any exists)