BSC 1010 Chapter Notes - Chapter 7: Electron Transport Chain, Atp Synthase, Oxidative Phosphorylation
26 Aug 2020
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Document Summary
Mitochondria are the site of aerobic respiration in eukaryotic cells: comparable in size to bacteria, most eukaryotic cells contain hundreds of mitochondria, also involved in calcium storage/release & apoptosis. Mitochondria can change their shape & number to suit a cell"s needs. Cells with high energy needs have many mitochondria: e. g. sperm and muscle cells, located in the region of the cell where the need is greatest. Mitochondria can fuse with each other (fusion), or split in two (fission: fusion > fission: elongated, interconnected mitochondria, fusion < fission: more numerous, distinct mitochondria. Outer mitochondrial membrane contains transport proteins (porins) The inner mitochondrial membrane is mostly impermeable to the passage of ions: contains proteins of the electron-transport chain, proton pumps, atp synthase, and transport proteins. The mitochondrion is divided into two aqueous compartments: matrix: interior of the mitochondrion (semifluid material) Intermembrane space: between the outer and inner membrane: similar composition as the cytosol.
