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- In the Nernst equation [V = 62 log10 (Co/ Ci)], the term Co represents: the intracellular concentration of potassium the intracellular concentration of chloride the membrane potential (in millivolts) the extracellular concentration of sodium the extracellular concentration of potassiumIn the Nernst equation [V = 62 log10 (Co / Ci)], the term Co represents: cell bio the intracellular concentration of calcium the extracellular concentration of potassium the extracellular concentration of sodium the intracellular concentration of potassium the membrane potential (in millivolts)Factor that is DECREASED Fluidity increases? or decreases? Permeability increase? or decreases? Explanation Degree of saturation Length of fatty acid '"tails" Temperature
- The diffusion coefficient for potassium ions crossing a biological membrane 10 nm thick is 1.0 x 10-11 m2/s. What flow rate of potassium ions will move across an area of 100 nm x 100 nm if the concentration difference across the membrane is 0.5 mol/dm3.Do cell maintain osomsis balance by being in the state of isontonic ?If Ecl=-70mV, and the membrane depolarises slightly to -60mV, how will Cl- behave?
- Estimate the osmotic pressure of a solution of 0.1 M NaCl at 25°C. Assume 100% ionization of solute.Isotonicity. Show your complete solution. 1. A hospital pharmacist fills a medication order calling for an intravenous fluid of dextrose 5% in a 0.9% sodium chloride injection and 40 mEq of potassium chloride in a total volume of 1000 mL. The intravenous infusion is administered through an IV set that delivers 15 drops per milliliter. The infusion has been running at a rate of 12 drops per minute for 15 hours. During the 15-hour period: (a) How many mEq of KCl have been administered? (b) How many grams of KCl have been administered? (c) How many millimoles of KCl have been administered? (d) What is the total osmolarity of the intravenous fluid? Express the answer in millimoles (rounded to the nearest whole number) per 1000mL.Molecules cannot move naturally through tje selmembrane against its diffusion gradient,but it does.Explain this statement critically using the sodium-potassium pump diagram
- We have isolated a mixture of 2 protein of the same molecular weight but different isoelectric points. The isoelectric points are 7.5 for Protein A and 9.0 for Protein B. What would be the order of elution from a cation exchange column if a buffer of pH 7 is used? Group of answer choices Both proteins will remain in the column. Both proteins will elute simultaneously Protein B followed by Protein A Protein A followed by Protein BFluid properties fatty acid solution at 42.5 and 1 atmThe three fundamental classes of proteins involved in transport across membranes are: i) channelsii) pumpsiii) exchangers For each class, describe its essential features, explain how transport is accomplished and name at least one representative example.