BIPN 100 Lecture Notes - Lecture 3: Nernst Equation, Membrane Potential, Androstenedione
16 Dec 2018
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Equilibrium potential for an ion is concentration gradient and electrical gradient, when the forces between these two gradients are balanced for that particular ion. Can be calculated using the nernst equation. Used to calculate the equilibrium potential of an ion. Equilibrium potential: when the driving force pushing the ion into and out of the cell are balanced. Chloride has a negative 1 charge (numerator and denominator is switched) Know how ions will move based on the equilibrium potential and the current membrane potential. A channel or tunnel between two cells. Direct chemical and electrical coupling between cells. Anchored molecules in the plasma membrane in one cell that interact with those of another cell. Made on demand: cytokines (proteins, soluble in water, usually receptor is on the surface, eicosanoids (lipids, can diffuse through the membrane. Hormones circulate throughout the body, act only where receptors are. Neurons: neuron releasing its neurotransmitters to a target cell which generates a response.
