Biology 1202B Chapter Notes - Chapter 5: Lipid Bilayer, Facilitated Diffusion, Passive Transport

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Cycle 1 outcomes- membrames: transport and signalling: describe the structure and common components of eukaryotic membranes. The plasma membrane is the outer limit of the cytoplasm. Allows certain molecules to pass through by means of active (requires atp) or. It is responsible for regulating the movement of substances in and out of cells. It has a selectively permeable barrier - uptake of nutrients and elimination of waste passive transport: des(cid:272)ri(cid:271)e how the (cid:862)fluid (cid:373)osai(cid:272) (cid:373)odel(cid:863) fits what is k(cid:374)ow(cid:374) a(cid:271)out the plas(cid:373)a membrane with respect to membrane structure/characteristics. The membrane consists of a fluid phospholipid bilayer. Proteins are embedded and can float freely. The phospholipid bilayer is the structural foundation of the plasma membrane. Proteins in the bilayer serve many functions - adhesion, communication, receptor, recognition and passive transport and active transport proteins. Mosaic aspect refers to the fact that membranes contain an assortment of proteins. The membrane has asymmetry: describe the factors affecting membrane fluidity.

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