Term
Resting membrane potential
Local potentials
Action potentials |
|
Definition
| What are the three different types of electrical potentials in the neural system? |
|
|
Term
Concentration gradient
Electrical gradient |
|
Definition
| What two forces acting on each type of ion determine the distribution of each ion? |
|
|
Term
|
Definition
| The behavior of charged particles (proteins and AA) near a surface of a semipermeable membrane to sometimes fail to distribute evenly across the two sides of the membrane (such as a plasma membrane) |
|
|
Term
| The presence of a different charged substance that is unable to pass through the membrane and thus creates an uneven electrical charge |
|
Definition
| What causes the gibbs-donnan effect? |
|
|
Term
Negatively charged ions trapped inside the neuron (proteins; Gibbs – Donnan).
Active transport of 3Na+ (out) and 2K+ (in).
Passive diffusion of Na+, K+ and Cl- through non-gated ion channels |
|
Definition
| What is the resting membrane potential, 70 mV, maintained by? |
|
|
Term
|
Definition
| What concentrations are higher on the outside of the cell? |
|
|
Term
| K+ and organic anions (PO4--- ) |
|
Definition
| What concentrations are high on the inside of the cell? |
|
|
Term
V=IR
V - Membrane Voltage
I - Current for an Ion
R - Resistance |
|
Definition
|
|
Term
I=(V - E) X g
I - Current of ion
V - Membrane voltage
E - Electromotive force of an ion
g - Conductance (inverse of resistance) |
|
Definition
| Alternate ohm's law (and meaning) |
|
|
Term
|
Definition
| The Vm will be closes to the ion with the best conductance? True/False |
|
|
Term
| Potassium (80% of membrane conductance attributed to K) |
|
Definition
| What ion has the best conductance in a normal cell? |
|
|
Term
|
Definition
|
|
Term
V=IR
V - Membrane Voltage
I - Current for an Ion
R - Resistance |
|
Definition
|
|
Term
I=(V - E) X g
I - Current of ion
V - Membrane voltage
E - Electromotive force of an ion
g - Conductance (inverse of resistance) |
|
Definition
| Alternate ohm's law (and meaning) |
|
|
Term
|
Definition
| The Vm will be closes to the ion with the best conductance? True/False |
|
|
Term
| Potassium (80% of membrane conductance attributed to K) |
|
Definition
| What ion has the best conductance in a normal cell? |
|
|
Term
|
Definition
|
|
