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EEOB 2520 Exam 4 Questions With Verified
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. - Answers✔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. - Answers✔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 ___.
- Answers✔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. - Answers✔Graded -
action
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. - Answers✔Schwann
- afferent or efferent
A correct series of events during an action potential is - Answers✔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? - Answers✔The voltage-gated sodium channels
The voltage-gated potassium channels.
ALL RIGHTS RESERVED.
EEOB 2520 Exam 4 Questions With Verified
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. - Answers✔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. - Answers✔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 ___.
- Answers✔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. - Answers✔Graded -
action
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. - Answers✔Schwann
- afferent or efferent
A correct series of events during an action potential is - Answers✔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? - Answers✔The voltage-gated sodium channels
The voltage-gated potassium channels.
