Information

Question 1

4 Types of Experimentation

Answer 1

1) Structure/function analysis
2) Comparison
3) Physiological measurement
4) Physiological manipulation
- Loss of function
- Gain of function

Question 2

Capacitance
Current
Voltage
Conductance
Resistance

Answer 2

Capacitance (C) = ability to store charge
Current (I) = movement of charge
Voltage (V) = difference in charge
Conductance (G) = how easily charges can move
Resistance (R) = how difficult it is for charges to move

Question 3

2 Conditions for Creating Voltage

Answer 3

1) Ionic concentration difference
2) Selective ion permeability

Question 4

Why does action potential move in one direction?

Answer 4

1) Voltage gated Na+ channels inactivate after action potential is reached
2) K+ channels create an undershoot

Question 5

Refractory Period (2 Types)

Answer 5

• Period where the neuron has a difficulty of starting a second action potential

Absolute: inactivation of the Na+ channel occurs. To get them active again, voltage has to be dropped to activate and close the channel. Na+ channel can be saved for later use.

Relative: voltage gated K+ channel opens. When opened, the voltage is pushed down toward K+ equilibrium. To get another action potential, need to fight against this counter acting action.