QuestionSBA
QuestionChoice
For the resting potential to be maintained three molecules of sodium are pumped out of the cell for every two molecules of potassium pumped into the cell. This results in a net deficit of positive ions within the cell and a negative potential across the cell membrane. Therefore the concentration of potassium ions inside the cell must be high compared to the outside
10026764
e
[Na+]: high, [K+]:high
QuestionChoice
The concentrations of sodium and potassium are maintained by the sodium-potassium pump. This leads to 3 sodium ions being pumped out of the neuron for every 2 potassium ions being pumped in leading to the resting potential of the cell membrane being around -70mV. High concentrations of extracellular potassium would lead to an increased equilibrium potential of potassium and a less negative cell membrane potential
10026761
b
[Na+]: high, [K+]:high
QuestionChoice
For the resting potential to be maintained three molecules of sodium are pumped out of the cell for every two molecules of potassium pumped into the cell. This results in a net deficit of positive ions within the cell and a negative potential across the cell membrane. Therefore the concentration of sodium ions outside of the cell must be high compared to the inside
10026763
d
[Na+]: low, [K+]:low
QuestionChoice
The concentrations of sodium and potassium are maintained by the sodium-potassium pump. This leads to 3 sodium ions being pumped out of the neuron for every 2 potassium ions being pumped in leading to the resting potential of the cell membrane being around -70mV. This results in a high concentration of sodium out of the cell and a low concentration of potassium in the cell
10026762
c
[Na+]: low, [K+]:high
QuestionChoice
The concentrations of sodium and potassium are maintained by the sodium-potassium pump. This leads to three sodium ions being pumped out of the neuron for every two potassium ions being pumped in leading to the resting potential of the cell membrane being around -70mV.
10026760
a
[Na+]: high, [K+]:low, [Ca2+]: high
Concept
Chapter
2693
5919
Potassium gradient and the resting membrane potential
Topic
181
Structure and Function of Cells
17750
At rest, neurons have a resting potential that is maintained by the movement of ions across the membrane.

Which of the following describes the composition of ions in the extracellular space relative to the intracellular space when the neuron is **resting**?
a