With a large and constant current injection, the leaky integrate-and-fire model responds to it with which of the following firing patterns? 12. (Part 05, easy) 105-Mid
A. an increasing firing rate throughout the entire input period
B. a constant firing rate.
C. a random spiking pattern
D. a decreasing firing rate.
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How does the membrane potential relax to the resting potential? 10. (Part 04, easy) 105-Mid
A. Linearly
B. With a parabolic curve
C. Exponentially
D. With a hyperbolic curve.
What happens to the resting potential in the leaky integrate-and-fire model when the conductance of a specific type of ion channels becomes extremely large? 9. (Part 04, difficult) 105-Mid
A. the resting potential does not change.
B. the resting potential approaches the reversal potential of the given type of ion channels.
C. the resting potential moves far away from the reversal potential of the given type of ion channels.
D. the resting potential becomes zero.
Why is the equilibrium potential of a membrane also called reversal potential? 5. (Part 03, medium) 105-Mid
A. Because it reverses the direction of an action potential of the neuronal cell.
Because it transforms a dendritic terminal into an axonal one.
C. Because the ions stop moving at the equilibrium potential.
D. Because the net flux of the ions reverses the direction when the membrane potential changes across the equilibrium potential.
The derivation of the Nernst equation does not require which of the following knowledge? 4. (Part 02, difficult)105-Mid
A. The energy consumed by an ion pump when transporting ions across the membrane.
Balance between the kinetic energy and electric potential across the membrane.
C. The distribution of kinetic energy of ions.
D. The probability that an ion flows across the membrane.
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