Generation and Propagation of Action Potentials

Question 1

In terms of resting membrane potential, what is unique about neurons?

Answer 1

They can rapidly change their membrane potential

Question 2

Opposite charges _____________; same charges ____________.

Answer 2

Are attracted to each other, are repelled

Question 3

It requires energy to keep opposite charges separated. So, when opposite charges are separated by a membrane, the system has ___________________.

Answer 3

Potential energy

Question 4

Define voltage, current, and resistance. ◦ What is used to measure voltage?

Answer 4

(Slides)

Measured in volts (V) or millivolts (mV) Instrument is Voltmeter

Question 5

Come up with a way to fully understand the principles of voltage, current, and resistance – and how these concepts interplay with one another. If my river example worked for you, you can steal it.
Be familiar with the equation on slide 5! I recommend plugging some made up numbers in to see how increasing/decreasing certain values changes the other values.

Question 6

In terms of resistance, define conductor and insulator.

Answer 6

Resistance - hinderance to charge flow

◦ Insulator : substance with high electrical resistance
◦ Conductor : substance with low electrical resistance
Insulator ex: plastic or foam Conductor: Metals like copper