BIO271H1 Lecture Notes - Threshold Potential, Axon Terminal, Resting Potential
Document Summary
Page 1 of 6 if you can"t answer them, go over the notes/textbook again; can also come to office hours. Membrane potential: many cells have voltage difference across their cell membranes. Many other cell types have a voltage difference too. We"re often biased when talking about neurons and think they do everything nervous system has other cell types as well (astrocytes, etc) and they"re critically important in how neurons function in nervous systems. 20 years ago, thought of glial cells as support network; now we know they"re much more active. How neurons are structured neurons can look very different. 100s or more signals are coming together at one time strong signal is converted to an action potential (ap), usually in region called axon hillock or signal/spike initiation zone signal integration signal conduction conducts action potential. Many are wrapped in myelin, allowing them to travel quickly signal transmission signal transmitted to another cell at the axon terminal.
