SHS 311 EXAM 2B Questions and Answers With Verified Solutions 2025
The cochlear microphonic has the same _____ as the input sound waveform? - ✔✔Frequency
During the repolarization phase of the action potential, which channel opens? - ✔✔K +
What do the auditory nerve fibers innervate? - ✔✔outer hair cells
What is spontaneous activity? - ✔✔Neural responses in the absence of sound/stimulation
4 phases of action potential - ✔✔1. resting state (maintained by sodium potassium pump)
2. depolarization (Na+ flows into cell)
3. repolarization (K flows out of cell)
4. hyperpolarization (extra K+ flows out of cell
Inside of the cell has greater concentration of ____ and the outside has greater concentration of ____. -
✔✔K+, Na+
Refractory period of a neuron - ✔✔After the action potential is generated, the Na+ pump closes, and
the neuron is trying to go back to its resting state (very quick)
channels ar inactive
What nerves make up the 8th cranial nerve? - ✔✔auditory nerve- vestibularcochlear nerve
4 cochlear potentials - ✔✔1. resting potential
2. summating potential
3. cochlear microphonic
4. compound auditory action potential
The cochlear microphonic has the same _____ as the input sound waveform? - ✔✔Frequency
During the repolarization phase of the action potential, which channel opens? - ✔✔K +
What do the auditory nerve fibers innervate? - ✔✔outer hair cells
What is spontaneous activity? - ✔✔Neural responses in the absence of sound/stimulation
4 phases of action potential - ✔✔1. resting state (maintained by sodium potassium pump)
2. depolarization (Na+ flows into cell)
3. repolarization (K flows out of cell)
4. hyperpolarization (extra K+ flows out of cell
Inside of the cell has greater concentration of ____ and the outside has greater concentration of ____. -
✔✔K+, Na+
Refractory period of a neuron - ✔✔After the action potential is generated, the Na+ pump closes, and
the neuron is trying to go back to its resting state (very quick)
channels ar inactive
What nerves make up the 8th cranial nerve? - ✔✔auditory nerve- vestibularcochlear nerve
4 cochlear potentials - ✔✔1. resting potential
2. summating potential
3. cochlear microphonic
4. compound auditory action potential
