1)If the cell is at +45mV would you expect Cl- to have a faster rate of flux or
ID: 3475701 • Letter: 1
Question
1)If the cell is at +45mV would you expect Cl- to have a faster rate of flux or a slower rate of flux through open channels than if the cell was at -70mV?
A---faster
B---slower
C---impossible to tell with this info
2) Click on the place on the image where K+ flux is at its fastest and where Na+ flux is at its fastest.
3) In which of the following times would you expect the symptoms of a person with multiple sclerosis to be at their worst?
A---First thing in the morning
B---When they had been sitting for long periods of time
C---After a long day of standing
D----After a hot shower (temporary increase in body temperature)
0 mV 55mV 70mV Time (ms)Explanation / Answer
1 If the cell was at -70mV, it would be rather difficult to bring it to the threshold levels so that an action potential can fire. But if the voltage is +45mV , most of the channels are in the opened state and an action potential can be generated,
2.PHASE 3 and PHASE 1 respectively.
3. For some onlnown resons, people with multiple sclerosis have worsening of symptoms when they are place in hot environment or have fever, This is known as UHTOFF'S SIGN.
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