MULTIPLE CHOICE:

1. Working to maintain resting levels in the neuron,sodium-potassium pumps use ________% of
             the brain’s total energy.
             a.10-15                                       c. 20-40
             b.18-22                                      d. 35-50

2. When calcium flows into the terminal, it causes
             a. the vesicles to fuse with cell membranes to releaseneurotransmitters into the synapse.
             b. magnesium to move to the post-synaptic neuron’s channels.
             c. the hillock to interpret an action potential.
             d. all of the above to happen.
3. Because potassium channels are a little slow to close,
             a. the cell becomeshyperpolarized         c.the brain gets confused
             b. neurons becomemalnourished          d. all of the responses are correct

4. Which of the following is NOT a facilitated end-result ofsecondary messengers?
             a.synaptogenesis                                                  c. short-term memory
             b. neurotransmitter synthesis andrelease             d. all of the responses are correct
5. Which of the following regarding saltatory conduction istrue?
             a. For it to occur, there must be an excessive amount of sodium inthe vesicles.
             b. The action potential is transmitted faster when myelin ispresent because of the process of
                          saltatory conduction.
             c. It is a process that is imperative for astrocytes to form.
             d. All of the responses are correct.
6.   When more glutamate is present, the AMPAchannel
             a. remains openlonger                                         c. is unaffected
             b. remains open a shorter period oftime             d. often is corrupted