Homework Help: ap biology

Posted by carol on Thursday, November 6, 2008 at 4:37pm.

10 . Which one of the following statements is NOT true about the resting potential? (28.3) [Hint]
A. The neuron's plasma membrane is much more permeable to potassium than to sodium.
B. The concentration of sodium is much higher inside the cell than outside.
C. The sodium-potassium pump plays a role in maintaining the resting potential.
D. Inside the cell, the concentration of potassium is much higher than the concentration of sodium.
E. All of these are true statements.

12 . A drug that causes potassium to leak out of a neuron, increasing the positive charge on the outside, would _____.
A.make it easier to trigger action potentials in the neuron
B.cause the cell to release its neurotransmitter
C.speed up nerve signals traveling the length of the cell
D.act as a stimulant
E.inhibit transmission of nerve signals by the neuron

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