PHYSL210A Lecture Notes - Lecture 2: Aquaporin, Atp Hydrolysis, Hydrophile
15 Sep 2017
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Document Summary
Pathway by which materials enter and exit cells without crossing the matrix of the cell"s plasma membrane. Uses vesicles, small structures within a cell where materials are enclosed in a lipid bilayer. Uptake of material into the cell via vesicles. Also called cell eating, engulfs bacteria or cell debris. White blood cells or macrophages use this in immune response: recognition of particle, attachment to phagocyte, pseudopodia extension ingests particle into a vesicle (phagosome, lysosome fuses to form phagolysosome, destruction and digestion, release of end products (exocytosis) Membrane of the cell indents of invaginates. Most cells do this, and form a pocket or endocytic vesicle. Nonspeci c process includes ecf and dissolved molecules, ions, nutrients. Clathrin is recruited to the cytoplasmic membrane to form a coated pit. Vesicles may deposit contents into lumens of organelles. Some travel across the cell and release the contents on the opposite side. Fuse with endosomes which sort contents to.
