The Nervous System: Membrane Potential
Record the intracellular and extracellular concentrations of the following ions (mM/L):
Excitable skin cells, like neurons, are more poroso to ___________ than to ___________.
How could the following changes affect the membrane layer permeability to K+? Work with arrows to indicate the change in permeability.
a. An increase in the quantity of passive K+ channels ___________ b. Opening of voltage-gated K+ programs ___________
c. Closing of voltage-gated K+ channels ___________
a. What acts as a chemical force that shoves K+ out of the cell? ___________ b. What force will pull K+ back into the cell? _____________________
When the two pushes listed above happen to be equal and opposite within a cell permeable only to K+, this is known as the _________________________ potential for K+ which is ___________ mV.
In an restless cell, as well permeable to Na+ and ClвЂ“, the gradients described in question some would both equally tend to maneuver Na+ ___________ the cell.
Would the gradient in question 5 promote or perhaps oppose the movement of ClвЂ“ in to the cell?
Since the neuron is permeable to Na+ as well as K+, the resting membrane potential is not equal to the equilibrium possibility of K+, rather it is ___________ mV.
What makes up for the movement (leakage) of Na+ and K+ ions? ______________
What will happen to the regenerating membrane potential of an restless cell if: (Write pos or neg to indicate which in turn way the membrane potential would change. ) a.
в†‘ extracellular fluid focus of K+ ___________
в†“ extracellular fluid attention of K+ ___________
в†‘ extracellular fluid focus of Na+ ___________
в†“ quantity of passive Na+ channels ___________
wide open voltage-gated K+ channels ___________
open up voltage-gated Na+ channels ___________...