AP questiion

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redmoon07

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part of reserch by medical student , cardiac cell has Ap of + 60 mv first time and + 30mv second time .......... why it's decrease in second time ......
a. student add more Na+ outside cell....
b. student remove the Na+ from outside cell.....
c. student add more K+ inside cell
d. student remove K+from inside cell
 
part of reserch by medical student , cardiac cell has Ap of + 60 mv first time and + 30mv second time .......... why it's decrease in second time ......
a. student add more Na+ outside cell....
b. student remove the Na+ from outside cell.....
c. student add more K+ inside cell
d. student remove K+from inside cell

Is the answer B?

I am thinking the AP peaked lower because there was less influx of Na.

K channels don't open until after the peak.

?
 
Is the answer B?

I am thinking the AP peaked lower because there was less influx of Na.

K channels don't open until after the peak.

?
👍 my guess

During the upstroke, it's going to the Nernst potential for sodium, which is normally +60. If there is a lower concentration of Na outside the cell, I would think it would lower the Nernst potential of Sodium. And, ass Cliff said, K+ channels don't open until after the peak.
 
sorry i have no answer 😕 as i just copied and pasted here from other forum.
but i also agree with B.:xf:
 
👍 my guess

During the upstroke, it's going to the Nernst potential for sodium, which is normally +60. If there is a lower concentration of Na outside the cell, I would think it would lower the Nernst potential of Sodium. And, ass Cliff said, K+ channels don't open until after the peak.

WHA ?!?!?!??!?!?!




lol j/k
 
11qib21.png
 
Surprised they let you take a capture of that. UW has the lockdown on my mac.

What OS is that? linux?

yea its ubuntu.

i'm using it exclusively to prep for the step because i can 1) screenshot uw diagrams to peruse without logging in and 2) stay away from the world of warcraft dir on my vista partition 😉
 
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