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2. During action potential, the influx of sodium is followed by the outflux of __________.
A) magnesium
B) chloride
C) calcium
D) potassium

3. the acronym EPSP is an abbreviation for:
A) Extra Personal Sensory Perception
B) Excitatory Potassium Synaptic Plus
C) Excitatory Post Synaptic Potential
D) Even Postmen Sing Posthumously

4. When action potential reaches the end of the axon, depolarization of the axon terminal allows __________ to enter the cell, causing __________ to leave the cell.
A) neurotransmitters; potassium
B) chloride; sodium
C) calcium; neurotransmitters
D) potassium; sodium

5. If the ESPSs exceed the IPSPs, then the neuron will:
A) shut down immediately
B) experience an action potential
C) experience an outflux of Ca++
D) go into a refractory period

6. If a neuron's membrane depolarizes to the point of threshold and an action potential occurs,
A) it will travel the length of the axon in an all or none fashion.
B) it will increase in strength as it reaches the terminal
C) it will travel some distance and then peter out
D) it will stop if it reaches closed sodium gates

7. If the soma of a neuron is stimulated at the axon hillock, causing an action potential to travel in one direction toward the axon terminal, and at the same time the axon terminal is stimulated, causing an action potential to travel toward the soma, what will happen when the two action potentials meet?:
A) the action potentials will cross and keep traveling in their own directions
B) the action potentials will get stronger
C) the action potentials will weaken
D) the action potentials will stop because the area behind each of them will be in a refractory period

8. We say that an action potential occurs when:
A) a neurotransmitter binds at receptor sites
B) the cell membrane of a nerve becomes depolarized and opens gates allowing sodium ions to enter the cell
C) stimulation of the neuron causes the cell to become more negatively charged
D) sodium ions escape from the cell through the sodium channels

9. The refractory period is:
A) the time required for two axons to send the action potential down its length
B) a period during which a neuron cannot fire
C) the time required for an axon to depolarize
D) the time required for neurotransmitters to diffuse across the synapse

10. When it becomes harder for the neuron to fire, is has become:
A) polarized
B) hyperpolarized
C) depolarized
D) repolarized

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