CAS BI 203 Lecture Notes - Lecture 4: Atp Hydrolysis, Cystic Fibrosis, Nernst Equation

• School: Boston University
• Department: Biology
• Course: CAS BI 203
• Professor: Uwe Beffert

Document Summary

Note go over neurotransmitter release signalling by neurotransmitter release at. When ap reaches nerve terminal leading to an triggers contraction of membrane neurotransmitter increase in it intracellular ion. Saroomeres in cytoplasm actionpotentials a synapse results in opening ofca"tchannels calcium that functionally and release of. Activetransport transport of molecules in an energetically unfavorable direction via transmembraneproteins requiresenergy. I energy is used to push molecules against the concentration gradient to ii na 1kt pump uses energy from atp hydrolysis to transport nat kt ions maintain ion gradients across membranes for osmotic balance against their electrochemical gradients. Natlkt gradient primes neurons for firing of aps and maintains osmotic balance 1 cell volume. 1heterodimercomposed of a subunitciotm domains dabsubunitg tm domain. 2 kt ion into cell active transport can be driven by ion gradients not just. Un"trumen high uses atp hydrolysis to transport molecules in 1 direction largest family of transporters has highly conserved atp bindingdomains.