26 Question 1A new monovalent ion, zirconium, is found to be 100 times more concentrated outside than inside the neural membrane. The neuron has channels that are selectively permeable to zirconium. What is the equilibrium potential for zirconium?+60 mV,-60 mV,+90 mV,-90 mV,+120 mV,-120 mV.
27 Question 2At the normal resting state there is no net current through the membrane. What is the Na/K pump doing?nothing,moving ions out,moving ions in,moving some ions in and moving others out
28 Question 3During the action potential, the sodium current is terminated by the sodium inactivation gate. How is the potassium current terminated?Potassium inactivation gateb. membrane voltagec. depletion of potassium ions,d. it’s not terminated
29 Question 4When a membrane is “charged” and maintains a voltage across it, most of the ions responsible for the charge are located just adjacent to the membrane. This distribution exists because:The membrane is sticky for ions,ions are repelled by the cytoplasm,ions are attracted to the other side of the membrane,ions like to accumulate near the ion-selective channels.
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