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Title: Review Sheet portion of Exercise 3: Neurophysiology of Nerve Impulses Post by: brecol205 on Nov 28, 2011 I am looking for answers to the Review Sheet portion of Exercise 3: Neurophysiology of Nerve Impulses. In the lab book these questions start on page PEx-53 and end on page Pex-58.
The first question: Q:Explain why increasing extracellular k+ reduces the net diffusion of k+ out of the neuron through the k+ leak channels. A: Increasing the extracellular potassium reduces the steepness of the concentration gradient and so less potassium diffuses out of the neuron. I have that answer but I am looking to double check the rest of my answers. Has anyone completed the entire review? Thanks for your time! Aubrey Title: Re: Review Sheet portion of Exercise 3: Neurophysiology of Nerve Impulses Post by: duddy on Nov 28, 2011 Increasing the extracellular potassium reduces the steepness of the concentration gradient and so less potassium diffuses out of the neuron.
Title: Re: Review Sheet portion of Exercise 3: Neurophysiology of Nerve Impulses Post by: Blinmalina on Dec 15, 2011 I've got this answer:
Increasing the extracellular K+ causes the membrane potential to change to a less negative value because when K+ ions diffuse out across the membrane they are leaving behind a net negative charge. Title: Re: Review Sheet portion of Exercise 3: Neurophysiology of Nerve Impulses Post by: biogirl83 on Feb 1, 2012 I got something like this: Increasing the extracellular K+ reduces the steepness of the concentration gradient; therefore, less potassium will diffuse out of the neuron (because the intracellular concentration of K+ is less).
Title: Re: Review Sheet portion of Exercise 3: Neurophysiology of Nerve Impulses Post by: manderz2584 on Apr 8, 2012 I got the same as they did!
Title: Re: Review Sheet portion of Exercise 3: Neurophysiology of Nerve Impulses Post by: jgreen0209 on Oct 3, 2012 hello guys im having a hard time with exercise 3 activities 5, 6,7, 8. i got all the others just missing these. thanks for the help
so today in class my teacher tells that exercise 1-5 are due by friday after telling us that we have two weeks to do. now it's one week and im real behind. i really need some help with several of the exercise. can someone please help me out. im new to this site but from the looks of it people seem very nice and helpfull. i got exercise 1 and 2 done but not really sure if they right and on excerise 3 i need activitys 5-8 nd then all of excercise 4 and 5. lol i know its alot but i thought i had 2 weeks. please anyone help me out with whatever you can. thanks aloy Title: Re: Review Sheet portion of Exercise 3: Neurophysiology of Nerve Impulses Post by: chin24 on Dec 20, 2012 This might help: https://biology-forums.com/index.php?topic=15294.0
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