BIO 012 Lecture Notes - Lecture 8: Resting Potential, Myelin, Inotrope

• School: Hofstra University
• Department: Biology (BIO)
• Course: BIO 012
• Professor: Lynch

Document Summary

During resting membrane potential, the atpase pump and leaky potassium pumps are active. During depolarization, voltage gated sodium channels open and allow the sodium on the outside of the axon to rush into the axon, creating voltage. During hyper polarization, the voltage gated sodium channels close inactivate and close so that the voltage gated potassium ions may then open current: the movement of ions. The hodgkins-huxley model: a model that explains how current moves in only one direction within an axon; It can be considered as operating sort of like a positive feedback loop that involves the dendrites, soma, myelin sheath, and notes of ranvier. The previous parts of an axon are in their refractory periods, aka hyper polarization periods. The voltage gated sodium channels inactivate as the voltage moves down the axon. How do these voltage gated na+ channels inactivate? . The active state allows for a free movement of na+ ions into the axon.