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A red blood cell of surface area 150 micrometer^2 is placed in asolution of 0.5M glycerol. If the diffusion coefficient across themembrane is 1.2x10^-12, what is the initial number of moleculescrossing the cell per unit time? assume the membrane is 12 nm thickand the concentration of glycerol inside the cell is0.304mol/dm^3
Cell membranes contain openings called ion channels that allow ions to move from the inside of the cell to the outside. Consider an ion channel with a diameter of 0.6 nm and a length of 14 nm with R = 109 O. During an action potential, this channel is open for approximately 1.0 ms for the flow of Na+ ions with a potential difference across the cell membrane of about 65 mV. How many Na+ ions travel through the channel?
Cell membranes contain openings called ion channels that allow ionsto move from the inside of the cell to the outside. Consider an ionchannel with a diameter of 0.6 nm and a length of 14 nm with R =109 O. During an action potential, this channel is open forapproximately 1.0 ms for the flow of Na+ ions with a potentialdifference across the cell membrane of about 65 mV. How many Na+ions travel through the channel?
