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PSIO 303 BLOCK 2 L6 Questions With Correct Solutions, Already Passed!!
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  • PSIO 303 BLOCK 2 L6

what is equilibrium? - a special case of a steady state. In a steady state, by definition, the conditions related to X do not change with time. Thus a transport system is in a steady state when both the driving forces acting on it and the rate of transport are constant with time. Equilibrium is t...

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  • August 17, 2024
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  • 2024/2025
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PSIO 303 BLOCK 2 L6
what is equilibrium? - a special case of a steady state. In a steady state, by definition, the
conditions related to X do not change with time. Thus a transport system is in a steady state when both
the driving forces acting on it and the rate of transport are constant with time. Equilibrium is the
particular steady state in which there is no net driving force and thus no net transport.'



List and discuss the diagnostic characteristics of passive diffusion. - ALL channels, and SOME
carriers, can only support NET transport DOWN the electrochemical gradient of their transported
substrates



One category of carrier can do something no channel can



Support net movement of their substrates AGAINST and electrochemical gradient



List and discuss the diagnostic characteristics of carrier mediated transport - Saturability



At low concentrations, transport increases in almost direct proportion in increases in [S]

First-order function



As [S] continues to increase, the rate of transport begins to approach a maximum value

At high enough substrate concentrations, the carrier-mediated process can be expected to 'saturate'



In the context of cellular physiology, describe the importance of the kinetic parameters J max and K t -
J max = maximal rate of a carrier-mediated transport system, product of the number of
transporters x the

turnover number

K t = equal to the substrate concentration that produces 'half-maximal' transport when the rate of
transport is

equal to J max /2)

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