BSC 215 Chapter Notes - Chapter 3: Endoplasmic Reticulum, Fluid Mosaic Model, Extracellular Fluid

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Bsc 215 textbook notes chapter 3 (the cell) Cells: the smallest units that can carry out the functions of life. Cell metabolism: chemical reactions that a cell carries out to maintain life: a(cid:374)a(cid:271)oli(cid:272) rea(cid:272)tio(cid:374)s: (cid:862)(cid:271)uildi(cid:374)g(cid:863), lead to produ(cid:272)tio(cid:374) of macromolecules, catabolic reactions: breakdown macromolecules, oxidation-reduction reactions: Three basic components of animal cells: the plasma membrane, cytoplasm, and nucleus. Plasma membrane: structural support, communication with other cells, cell identification. Cytoplasm: consists of both fluid cytosol and structures embedded in it. Organelles: molecular machines that perform specific functions in the cell. Cytoskeleton: consists of a network of protein filaments, holds organelles in place, maintains cell shape. Nucleus: contains the dna, primary location for producing most of rna. Their head are highly polar regions (love water) and tails are nonpolar regions (hate water) Fluid mosaic model: current model of plasma membrane. Osmosis: movement of water (or the solvent), water will move from lower solute concentration to higher solute concentration, driven by osmotic pressure.

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