BIO 3305 Study Guide - Myelin, Depolarization, Oligodendrocyte
Document Summary
Small flashing light on the wall, they last about 1 sec and occur every 3 seconds. Upon closer inspection you find that the source of the light comes from a flea like crustacuean. A few mm in length (maybe even a single cell) you decide to investigate further. What"s happening in the membrane (which ions are flowing through) and if you were to take the flea into the lab how would you do your experiment to conclude your hypothesis. Answer to the flashing curstacean: potassium channels need to have opened up. We test it by putting a drug that blocks the channel. If you"re gonna test the hypothesis you have to do it in the partial darkness at least to see the light. How do we go from graded to action potentialwe need to hit the threshold. Excitatory: depolarizing graded potential brings the membrane potential at the axon hillock closer to reaching threshold to generate ap.
