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BIOL 2313 (3)
Lecture

Cellmembranesandtransport.doc

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Department
Biology
Course
BIOL 2313
Professor
Donald Cheney
Semester
Spring

Description
Cell membranes and transport I. Purpose of membranes - cellular and organelle A. Continuum of systems - nucleus and endoplasmic reticulum 1. "Flow of metabolites" B. Isolation - mitochondrion cannot fuse with nucleus 2. "Independent recognition sites" C. Passage of metabolites 1. Diffusion - from high concentration to low concentration 2. Osmosis - movement of water through a differentially permeable membrane a) From high concentration to low concentration b) Selectivity - active transport 3. Carrier systems a) Chloroplast 1) H pumped into thylakoid lumen 2) H then transported to outer stroma and coupled to make ATP b) Mitochondri+n 1) H pumped out to intermembrane space 2) H then transported to inner matrix and coupled to make ATP II. How is specific transport accomplished? A. Biological membranes 1.
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