1395536

Question: Assume ionic concentrations in the nervous system
of:
[K]o = 4 mM
[K]i= 155
mM
[Na]o= 145 mM
[Na]…


Assume ionic concentrations in the nervous system
of:

[K]o = 4 mM

[K]i= 155
mM

[Na]o= 145 mM

[Na]i= 12 mM

4. If the resting membrane of a neuron
could only conduct
Na, would the
resting membrane potential
(RMP) be the same as, or different from
ENa? Why? [2]

5. Calculate what the RMP would be for a neuron only
permeable to Na. Does this ever occur in the nervous system?
Explain your answer.  

6. Explain in your own words why the membrane potential
of a neuron is a negative value and always lies closer to
EK t
han to
ENa? [4]

(Visited 1 times, 1 visits today)