Which of the following statements about action potentials in a given neuron is false? a. all action potentials for a given neuron are identical in magnitude. b. all action potentials for a given neuron are identical in duration. c. action potentials are propagated down the length of the axon. d. movement of ions during the action potential occurs mostly through the sodium pump. e. the frequency of action potentials, not their size, is the meaningful signal.

1. seamount a raised footwall block between normal fault creates this 2. syncline break between rocks where a hanging wall rises relative to a footwall 3. hot spring on rolling hills, this a dip between hills 4. volcanic neck created when a block with hanging walls slips down between normal faults 5. caldera underwater volcano that never reaches above sea level 6. horst natural hot water on earth's surface containing many minerals 7. graben underwater volcano whose top is eroded flat by waves 8. crater less than a mile in diameter; looks like a bowl at the top of a volcano 9. guyot magma that filled the central vent that remains after the volcano has eroded 10. reverse fault over 1 mile in diameter; looks like a bowl over a volcano