Which of the following help to set the resting potential of a neuron? (Select all that apply) The permeability of the membrane to potassium ions. The activity of the sodium/potassium pump. The concentration of potassium ions inside and outside the cell. The concentration of sodium ions inside and outside the cell. The permeability of the membrane to sodium ions.
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The concentration gradient of a neuron at rest Brings a neuron to threshold and triggers action potential Increase in membrane potential of cell, more negative, relative to normal resting potential. Maintained by the sodium-potassium pump Reduction (toward 0) of the membrane potential, relative to normal resting potential
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For a neuron at resting membrane potential, please SELECT ALL OF the correct statements. A) There is a higher concentration of sodium (NA+) outside the cell than inside the cell B) The electrical gradient works to pull K+ into the cell via open K+ leak channels, while the chemical gradient pulls K+ out of the cell until the K+ reaches equilibrium C) Inside the cell is positively charged relative to the outside of the cell D) Positively charged DNA and proteins contribute to overall charge difference across the membrane. E) The sodium-potassium pump (Na/K pump) is actively pumping sodium (Na+) out of the cell and potassium (K+) in. F) Voltage gated sodium (NA+) channels are open
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The sodium-potassium pump a. uses energy to move sodium ions out of the cell and potassium ions into the cell. b. can move sodium ions only from an area where they are highly concentrated to an area where they are less concentrated. c. can move potassium ions (K') only toward a region that is positively charged. d. is part of the myelin sheath.
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