1. Neurophysiology

Question 1

___ are thin, blank processes that receive incoming information from neighboring cells.

Answer 1

Dendrites

Question 2

What is the primary function of an axon?

Answer 2

To transmit outgoing electrical signals from the integrating center of the neuron to the end of the axon

Question 3

Restin cell membrane is much more permeable to K+ or Na+

Answer 3

K+, this makes it the major ion contributing to the resting membrane potential

Question 4

What is the equilibrium potential of potassium (Ek)?

Answer 4

-90mV

Question 5

What is the equilibrium potential of sodium (ENa)?

Answer 5

+60mV

Question 6

Nerst Equation

Answer 6

Eion = (RT/ZF)(ln([Ion]out/[Ion]in)) 
Z = ion charge
E = voltage or electrical potential

Question 7

@37 degrees C

Eion = (1/z)(61xlog([Ion]out/[Ion]in))

Answer 7

@37 degrees C

Eion = (1/z)(61xlog([Ion]out/[Ion]in))

Question 8

Goldman Equation @ 37 degree C

Answer 8

Vm (membrane potential) = log((Pk[K+]out + PNa[Na+]out + PCl[Cl-]in)/(Pk[K+]in + PNa[Na+]in + PCl[Cl+]out))

Question 9

In order to reach membrane potential, you need ___ ____ for ions to pass through membrane.

Answer 9

Leak Channels

Question 10

There are more potassium or sodium leak channels?

Answer 10

Potassium

Question 11

If only 1 ion can cross (only one channel for certain ion like sodium)…

Answer 11

Goldman equation becomes Nerst equation

Question 12

Ion is…

Answer 12

the number of ions or charges crossing the membrane

Question 13

Force applied on Ion equation

Answer 13

F ion = Vm - Eion

Question 14

Conductance (G ion)

Answer 14

The ability for ion to cross membrane.
- Similar to permeability. They both tell the same thing. things that increase P increase conductivity.
I ion = G ion (Vm - Eion)

Question 15

There is more information in the notes, be sure to look over it please.

Answer 15

There is more information in the notes, be sure to look over it please.