Lecture_15_2011

Lecture_15_2011 - Introduction to Biophysics Lecture 15...

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Introduction to Biophysics Lecture 15 Membrane
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Cell membrane is a well organized structure fulfilling a broad spectrum of physiological functions: Separation from environment. A barrier of diffusion. Controls the ionic composition of the cytoplasm by highly specific transporters (molecular and ion pumps). Mechanical structure to guaranty cell integrity, shape, movement, endocytose. As a surface, forms a dynamic matrix for enzymatic reactions. Central in biological communication –membrane receptors. Immunological recognition. Place for energy conversion processes. Electrically isolating leaflet it contains a mosaic of various passive an active electrical devices, controlling membrane potential.
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Minimum of surface tension (phenomenological description) – on molecular level – result of dynamics of water structure and hydrophobic interactions. hydrophilic
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Lecture_15_2011 - Introduction to Biophysics Lecture 15...

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