BIOLOGY 1A03 Lecture Notes - Lecture 1: Respiratory Tract, Lipid Bilayer, Microbiota
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BIOLOGY 1A03 Full Course Notes
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Streptococcus salivarius: a normal inhabitant of the upper respiratory tract and oral cavity. Phospholipids are the building blocks of membranes: all cells are surrounded by a membrane that contains phospholipids, cell: a membrane bound structure containing macromolecules, the four classes of macromolecules are, nucleic acids. All cells are surrounded by cell membranes: membranes separate an internal environment from the external environment. This allows there distinct environments to have a different chemical composition. Steroids such as cholesterol is found in every cell membrane in our body, making up. Membrane fluidity: the ability of phospholipids to move: not all membrane have the same amount of fluidity. Fluidity changes the permeability of membranes: less fluid membranes with fewer unsaturated fatty acids and more cholesterol leads to. Large, charged polar molecules have greater difficulty in moving across the lipid bilayer: membrane transport can be made better, proteins embedded in the phospholipid bilayer can facilitate transport of larger, charged, polar molecules across the membranes.