Exam (elaborations)
Portage Module 6 Problem Set- Pathophysiology
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Portage Module 6 Problem Set- Pathophysiology
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1-32 of 32Describe each phase of an action potential.
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Phase 1: Resting Potential: During the resting phase, both sodium and
potassium gates are closed.
Phase 2: Depolarization: The sodium gates open, and sodium rushes into
the axon during the depolarization phase of the action potential. Voltage
travels to zero and then up to +40 mV.
Phase 3: Repolarization: The sodium gates close, and potassium gates
open allowing potassium to rush out of the axon. This returns a negative
voltage to the inside of the axon.
, Phase 4: After-polarization, also called hyperpolarization. Potassium gates
are slow to close, and there is an undershoot of the potential. The voltage
drops below -70mV and then returns to -70mV as the resting state is re-
established.
What are the 3 hallmark signs of Parkinson's disease?
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Tremor, rigidity, bradykinesia
What is the major difference between central sleep apnea and obstructive sleep
apnea?
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The brain does not properly signal the respiratory muscles with central
sleep apnea. With OSA, the airway collapses, but the respiratory muscles
maintain their function.
What stage of sleep is impaired with a diagnosis of narcolepsy?
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REM sleep
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