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1. Why are action potentials important?
A
allow for communication between neurons
B
prevent transmission of information
C
provide structural support for neurons
2. Which mechanism do action potentials utilize?
A
all-or-nothing
B
graded electrical response
C
both
3. What is depolarization?
A
the cell becomes more negative
B
the cell becomes more positive
C
the cell releases neurotransmitters into the synapse
4. What happens during the refractory period?
A
neurotransmitters bind to dendrites
B
APs travels down the axon
C
the cell resets after depolarization
5. In which phase does the cell rapidly become more negative than its original charge?
A
resting state
B
hyperpolarization
C
depolarization
6. T/F: Propagation of an AP is a self-sustaining process
A
false
B
unsure
C
true
7. T/F: An AP can occur without the stimulus threshold being met
A
true
B
false
C
in special circumstances
8. What is the value (mV) of the cell's resting potential?
A
-70mV
B
70mV
C
-55mV
9. At peak polarization...
A
the cell's charge is +50mV
B
the AP process has completed
C
positive ions rush into the cell, making the cell more positively charged