Back نقل سلبي Arabic Pasivni transport BS Transport passiu Catalan Transporte pasivo Spanish Transport passif French Transpò pasif HT Passzív transzport Hungarian Transpor pasif ID Trasporto passivo Italian 受動輸送 Japanese
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Passive transport is a type of membrane transport that does not require energy to move substances across cell membranes.[1][2] Instead of using cellular energy, like active transport,[3] passive transport relies on the second law of thermodynamics to drive the movement of substances across cell membranes.[1][2][4] Fundamentally, substances follow Fick's first law, and move from an area of high concentration to an area of low concentration because this movement increases the entropy of the overall system.[4][5] 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.[citation needed] The four main kinds of passive transport are simple diffusion, facilitated diffusion, filtration, and/or osmosis.
Passive transport follows Fick's first law.
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- ^ "5.3 Active Transport - Biology 2e | OpenStax". openstax.org. 28 March 2018. Retrieved 2020-12-06.
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- ^ "12.7 Molecular Transport Phenomena: Diffusion, Osmosis, and Related Processes - College Physics for AP® Courses | OpenStax". openstax.org. 12 August 2015. Retrieved 2020-12-06.