Ch 6 - Functional Properties of Neuron Flashcards Preview

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Flashcards in Ch 6 - Functional Properties of Neuron Deck (21)
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0
Q

conductance equation

A

g = sigma x cross sectional area/length

1
Q

this force creates a potential difference and it is measured by work

A

electrostatic

2
Q

bad conductor

A

lipid

3
Q

conductance is also =

A

1/ resistance

4
Q

current (A) formula

A

current (Amps) = potential difference (Volts) x conductance (Siemens)

5
Q

current is usually the flow of ions from blank to blank

A

positive, negative

6
Q

work formula

A

= force x distance

7
Q

amount of energy that needs to be overcome combined with the electrostatic energy of the capacitor

A

force

8
Q

increasing surface area of the axons, the greater the blank because there is more room for blank

A

capacitance, charge

9
Q

if the plates of a capacitor are farther apart, then more blank must be done because the blank is lower

A

work, capacitance

10
Q

important passive property of the neuron that is the distance where the initial voltage response decays to 37 percent of its initial value

A

length constant

11
Q

length constant formula

A

wavelength = sqrt(rm / ro + ri)

12
Q

time constant equation

A

t = rm x cm

13
Q

large cells have blank time constants

A

short

14
Q

small cells have blank time constants

A

long

15
Q

ion channels can be thought of as blank

A

resistors

16
Q

ion channels allow for the blank property of the membrane

A

leaky

17
Q

conductance is related to

A

current and voltage

18
Q

no current means there is an equilibrium of blank and blank gradients

A

electrical, chemical

19
Q

wide and short axons have blank conductance and blank resistance???

A

high, little

20
Q

nodes of ranvier are not blank

A

myelinated