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What is Passive transport in Biology? PDF | Download eBooks

Learn Passive transport definition in biology with explanation to study “What is Passive transport”. Study passive transport explanation with biology terms to review biology course for online degree programs.

Passive transport Definition

  • Passive transport is the transport of molecules along a concentration gradient.

    Campbell Biology by J.B. Reece, L.A. Urry, M.L. Cain, S.A. Wasserman, P.V. Minorsky, R.B. Jackson



Passive transport Explanation

Passive transport is a movement of ions and other atomic or molecular substances across cell membranes without need of energy input. Unlike active transport, it does not require an input of cellular energy because it is instead driven by the tendency of the system to grow in entropy. The rate of passive transport depends on the permeability of the cell membrane, which, in turn, depends on the organization and characteristics of the membrane lipids and proteins.

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