Biology 12 Lesson Outline Date May 9th 2016
| Last lessons Objective | Nervous System
Structure and function of synapse in Neurons https://en.wikipedia.org/wiki/Synapse https://www.youtube.com/watch?v=rWrnz-CiM7A https://www.youtube.com/watch?v=p5zFgT4aofA https://www.youtube.com/watch?v=SOMQSK68SBU
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Evalu |
| Today’s Objective | Action potential in axon
Role of sodium potassium shunt Role of schwann cells in neurons
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| Topic
Number One |
Action Potential
Wiki https://en.wikipedia.org/wiki/Action_potential From UW https://faculty.washington.edu/chudler/ap.html
Great Discussion from Harvard http://outreach.mcb.harvard.edu/animations/actionpotential_short.swf
Great lesson..so go and visit! http://www.physiologyweb.com/lecture_notes/neuronal_action_potential/neuronal_action_potential.html
· Note Is this a process that requires energy? What are the affects of drugs upon action potential? How does myelin affect the speed of action potential? |
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| Topic
Number Two |
If we follow the path that sodium potassium pumps create a message to flow down the axon..then here are some articles to ponder regarding drugs and sodium potassium pumps
· http://www.britannica.com/science/nervous-system/Active-transport-the-sodium-potassium-pump · http://www.britannica.com/science/nervous-system/Active-transport-the-sodium-potassium-pump · http://flipper.diff.org/app/items/info/3239
Interesting lab https://www.nabt.org/websites/institution/File/pdfs/DB/neuroscience_lab/12NLCAchp10.pdf A learned response to first fyear med discussion board..
The sodium potassium pump maintains the resting membrane potential (which is polarized, i.e. negative with respect to the outside). The definition of “hyperpolarization” is “even more polarized (i.e. more negative) than RMP”… thus an action potential is depolarization, repolarization, hyperpolarization, then after-hyperpolarization (as the K channels inactivate). I know what you’re basically trying to say (which isn’t what the original guy asked, I think), but you’re using the wrong terminology… hyperpolarization (if you can even call that a state) is transient, the dip under the resting membrane potential after an action potential. Wow, too many parentheses.
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| Topic
Number Three |
Schwann cells and axons and neurons
https://en.wikipedia.org/wiki/Schwann_cell
Role in nerve repair https://www.mpg.de/6880054/glial-cells_nerves
Journal abstract and article http://www.jneurosci.org/content/24/42/9250.full
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| Ref | Welcome to world of university notes
http://www.mhhe.com/biosci/genbio/maderinquiry/lecture/lecture17.html
This one is great! http://people.eku.edu/ritchisong/301notes2.htm
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| Neurons and laughter
..so a duck walks into a bar
http://hms.harvard.edu/sites/default/files/HMS_OTB_Spring10_Vol16_No2.pdf http://www.deccanherald.com/content/172419/humour-lights-up-neurons-our.html
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Exam on Excretory System Then.. Next class…from Peripheral to Central nervous system a) Reflex Arc b) Messages to the brain
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