This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: Open channels (aka leak channels/pores) – channels that are usually open Gated channels – channels that spend most their time closed Stimulus to open: 1. 2. 3. Drawing of enterocyte in intestine: During homeostasis where will you usually find Na+, K+ and Cl-? (intracellular or extracellular) If there were no glucose in the lumen, what would happen to the Na+/K+ ATPase? What would happen if you poison an enterocyte with ouabain? Equilibrium potential – Nernst equation: *Only applicable when a cell is permeable to one ion* What is the equilibrium potential for a cell with 5mM of Cl- on the inside and 100 mM of Cl- on the outside? What does this number represent?...
View Full Document
- Spring '06
- Osmosis, concentration gradient, Fick