Which of the following statements is not relevant to the inhibitory effect of a GABA receptor?
A. It has a very low reversal potential.
B. It is permeable to Cl- which has a higher extracellular than intracellular concentration.
C. It is an ionotropic channel.
D. Its activation leads to an influx of negative ions.
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What is the major difference between the persistent and transient channels? 23. (Part 09, easy)105-W2
A. the persistent channels are ionotropic channels while the transient channels are not.
B. The transient channels have inactivation gates which block the channels shortly after the activation.
C. The persistent channels do not have any gating mechanism.
D. The transient channels do not have activation gates.
The upstroke portion of the action potential in the Hodgkin-Huxley model is caused by 26. (Part 10, medium) 105-W2
A. the activation of sodium channels.
B. the activation of potassium channels.
C. the inactivation of the sodium channels.
D. the activation of leak conductance.
The characteristic length λ in the linear cable equation is determined by all but which of the following parameters? *28. (Part 11, easy) 105-W3
A. Radius of the cable.
B. The resting membrane potential.
C. The membrane resistance.
D. The longitudinal resistance along the cable.
When a constant current is injected into a dendrite, how does the membrane potential changes along the dendrite? 31. (Part 12, easy) 105-W3
A. The membrane potential remains constant.
B. The membrane potential decays linearly.
C. The membrane potential follows a Gaussian distribution.
D. The membrane potential decays exponentially.
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