BIO304H5 Lecture 6: BIO304 Lecture 6 (1)
Document Summary
Term test 1 will take place in class, on wednesday february 6th. 1 hour and 40 minutes (12:10 to 1:50 pm) Review lecture in class on monday feb. 4th. Readings for today - chapter 7 page 114-122. Batteries producing membrane voltage - if we lose batteries, voltage goes to 0 because loss of voltage sources* Changes in membrane voltage during excitation can be understood with ghk equation. Rmp is set by different ions trying to pull vm towards their equilibrium potentials. Both potassium (purple) and sodium (yellow) want to pull the membrane voltage to their equilibriums and make is what their equilibrium potential is. Battery power of potassium = -74mv of energy and battery power of sodium is 54. 4 mv. Both try to pull to those numbers. Solution - vm at rest can be defined by the ghk equation. The k+ gradient and ek wins because it has the larger conductance.
