APA 2312 Study Guide - Midterm Guide: Oxidative Phosphorylation, Adenosine, Citric Acid Cycle

• School: University of Ottawa
• Department: Human Kinetics
• Course: APA 2312
• Professor: Carla Geurts

Document Summary

Iniiate contracion: begins with ap sent down to motor neuron. Excess of sodium on outside, potassium on inside. Signal is brief reversal of membrane potenial (-70mv - +30 mv back to -70mv) Rmp: high concentraion of ions on one side, low on other gradient. Electrical gradient count posiive ions inside + outside. Potassium ion channel leaks more than sodium channel, some ions move across (move with gradient from high low concentraion) Chemically acivated ones allow sodium to enter: chem gradient of sodium up, potassium down when there is graded potenial. Quick change in tmp: quickly ater, sodium channels lock. Voltage acivated channels for potassium open later, for reestablishment of tmp: now, sodium on inside and potassium outside. If sodium channels open up now, tmp can sill be changed, but voltage gated channels cannot open and. There is now a reversal of gradients: a pump needs energy. Complete ap (be able to explain) (copy and study igure on complete ap slide)