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EEOB 2520 Exam 4 Practice Questions and Answers

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EEOB 2520 Exam 4 Practice Questions and Answers The graded potentials starting each myelinated section of axon ( i.e, end of each node) are ___ in size. The first action potentials at the start of each node (i.e, just after a myelinated section) are ___ in size. - ANSWER-Identical - identical ...

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  • October 30, 2024
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  • EEOB 2520
  • EEOB 2520
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EEOB 2520 Exam 4 Practice Questions

and Answers


The graded potentials starting each myelinated section of axon ( i.e, end of each node) are ___ in size.

The first action potentials at the start of each node (i.e, just after a myelinated section) are ___ in size. -

ANSWER✔✔-Identical - identical


During an action potential, when the sodium channels inactivate, the chemical gradient for potassium is

in the ___ direction as potassium's electrical gradient. At this point, we are told that potassium ___ the

cell. - ANSWER✔✔-Same - exits


The current measurement of a typical cell's membrane potential is -60 mV. That cell should therefore be

correctly categories as ___ and the likelihood of an action potential occurring is ___. - ANSWER✔✔-

Depolarized - not able to be determined.


Scenario 1: one person standing on each goal line in the empty Shoe try to talk to each other but neither

can hear the other person. Scenario 2: nine people are added. One on each 10-yard increment of the

field. Now the goal-line people can hear each other as their words are relayed through the people

between. Correctly applying the terminology of potentials, Scenario 1 would be like a(n) ___ potential

Scenario 2 would be like a(n) ___ potential. - ANSWER✔✔-Graded - action



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, ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




During anatomy lab, you dissect a group of axons in the cadaver's right wrist. You correctly tell your lab

partner that you are observing ___ cells and parts of ___ neurons. - ANSWER✔✔-Schwann - afferent or

efferent


A correct series of events during an action potential is - ANSWER✔✔-Depolarization, threshold,

repolarization




Sodium influx, potassium outflux


During an action potential, which type of channels are open at the peak (i.e., highest amplitude) of the

Vm? - ANSWER✔✔-The voltage-gated sodium channels




The voltage-gated potassium channels.


Astrocytes are physically ___ than neurons and cause ___ neurotransmitters to be available for the

neurons. - ANSWER✔✔-Smaller - less


Cell B's cytosol is observed to be more negatively charged than the surrounding interstitial fluid. A

mechanically-gated sodium channel is open in Cell B. Assuming a typical sodium distribution, sodium

would have a net movement ___ Cell B. - ANSWER✔✔-Into




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