As we will see when we discuss central synapses, certain events (such as the act

Question

As we will see when we discuss central synapses, certain events (such as the activation of second messenger systems) can cause the opening or closing of ion channels (for ex., opening of more leakage channels), or the addition or removal of ion channels from the membrane. When these changes occur, they can alter the response of a neuron to synaptic inputs. This is one way that synaptic plasticity occurs in the nervous system, a phenomenon necessary for learning and memory 22) Imagine that you inject 1nA of hyperpolarizing current into a cell for 1 msec and see a -5mV change in membrane potential during that time. If more leakage channels to open, would you expect the amplitude of the cell's response (i.e., it's change in membrane potential) to injected current to change? (4pts) a) Yes, opening more leakage channels would result in a larger change in Vm. b) Yes, opening more leakage channels would result in a smaller change in Vm. cNo, opening more leakage channels would not have any effect on how much Vm changes.

Explanation / Answer

Correct ans option (a).because of leakage of more channel

There is influx of ion and membrne potential increse .the injected current act to increse passively membrane potential.membrane potential increase and achieve threshold potential.

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