If the extracellular K* concentration increases to 20 mM, what would be the Nernst Potential of K* and what would happen to the resting membrane potential of the cell?
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- Conformational changes in channel proteins brought about by voltage changes are responsible for opening and closing Na+ and K+ gates during the generation of an action potential. (True or false?)What is the equilibrium membrane potential due to Na+ ions if the extracellular concentration of Na+ ions is 154 mM and the intracellular concentration of Na+ ions is 23 mM at 20 ∘C ?What is the equilibrium membrane potential due to Na+ ions if the extracellular concentration of Na+ ions is 154 mM and the intracellular concentration of Na+ ions is 27 mM at 20 ∘C ? Please answer asap and in short and content should not be palgarised please
- What is the equilibrium membrane potential due to Na+Na+ ions if the extracellular concentration of Na+Na+ ions is 138 mM138 mM and the intracellular concentration of Na+Na+ ions is 21 mM21 mM at 20 ∘C20 ∘C ?Calculate the equilibrium membrane potentials to be expected across a membrane at 37 ∘C, with a NaCl concentration of 0.50M on the "right side" and 0.08 M on the "left side", given the following conditions. In each case, state which side is (+) and which is (−). (a)Membrane permeable only to Na+.Calculate the equilibrium membrane potentials to be expected across a membrane at 37 ∘C, with a NaCl concentration of 0.50M on the "right side" and 0.08 M on the "left side", given the following conditions. In each case, state which side is (+) and which is (−). Membrane permeable only to Cl−.
- Calculate the equilibrium membrane potentials to be expected across a membrane at 37 ∘C, with a NaCl concentration of 0.50 M on the "right side" and 0.08 M on the "left side", given the following conditions. In each case, state which side is (+) and which is (−). Membrane equally permeable to both ions.If the equilibrium potential for K* is -90mV, and the charge inside the cell is -70mV, which direction will K move across the membrane assuming there is permeability (membrane leak channels) which allow it to pass?Intracellular potentials are on the order of -100mV, whereas extracellular potentials are OmV. Assuming these values, answer the following questions. (a) What is the electric potential energy of a chloride ion (CI-) inside a cell? (b) What about outside the cell? (c) What is the probability of finding a Cl- inside the cell relative to finding it outside the cell? Assume that T=310K. P(inside) P(outside) (d) If the concentration of Cl- outside the cell is 100mM, what is the expected concentration inside the cell?
- How can the resting membrane potential of a membrane be calculated using the Goldman-Hodgkin-Katz (GHK) equation?Calculate the equilibrium membrane potentials to be expected across a membrane at 37 °C, with a NaCl concentration of 0.10 M on the “right side” and 0.01 M on the “left side”, given the following conditions. In each case, state which side is (+) and which is (-). (a) Membrane permeable only to Na+ (b) Membrane permeable only to Cl– (c) Membrane equally permeable to both ionsTable Q1(a) shows typical values for the intracellular and extracellular concentrations of the major ion species (in millimoles per litre) for frog skeletal muscle. Table Q1(a) Permeability (cm/s) 2 x 10-8 2х 10 Ions Intracellular Extracellular Na* 12 145 K+ 155 4 4 120 4 x 106 By referring to Table Q1(a), compute the equilibrium resting potential for this membrane by assuming the room temperature is 20° C. Given the Boltzman's constant, k = 1.38 x 1023 J/K and an electronic charge, q = 1.602 x 10-19 C.