BIOL 2P03 Lecture Notes - Lecture 5: Voltage-Gated Potassium Channel, Resting Potential, Ion Channel
11 Feb 2016
School
Department
Course
Professor
Document Summary
Unequal movement of charged molecules across the membrane results in a separation of charge (this is known as the potential diference) Ion channels are transmembrane proteins that create water illed pores in the plasma. Are transmembrane proteins that create water illed pores in the plasma membrane that are permeable to select ions. From closed open is activation -from open to closed deactivation. This is caused by a physical block of central pore by inactivation gate. Recovery from inactivation is the term used to describe the removal of the inactivation gate and the change in ion channel. K+ has a higher concentration inside the cell than outside. When ion channels allow k+ to move across the membrane, it leaves the cell down its concentration gradient. As k+ leaves the cell, the inside of the cell becomes more negative than the outside. There is a separation charge known as a potential diference (v)
