Neural membrane potentials are achieved in part by the sodium-potassium exchange
ID: 1556241 • Letter: N
Question
Neural membrane potentials are achieved in part by the sodium-potassium exchange pump, which increases the concentration of positively charged ions on the outside of the neuron. This separation of charge creates an electric field. Which of the following does NOT affect the value of the net electrostatic force within a system? A. Changes in the charge of the particles involved B. Changes in the distance between the particles C. Changes in the value of Coulomb’s constant for the system in question D. Changes in the number of particles involved
Explanation / Answer
Electrostatic force is given by
F = kq1q2/r^2
Where k is coulomb's constant
q1 and q2 are charges
r is distance between them
F is the force
Hence changing A B and C force will change but would not be affected in case of D
Hence answer is D Changes in the number of particles involved