BI110 Chapter Notes - Chapter 19: Organelle, Invagination, Cytoskeleton
Document Summary
Move large substances (macromolecule & big bacteria) across pm. Endocytosis: movement of materials into cell using vesicle. Exocytosis: use of vesicle to send materials out of cell. Cells use vesicles to move large materials, or large quantities across mem. Vesicle: mem-bound structure, distinguishing endo & exo from diffusion/ protein transport. Cell to secrete materials from inside to out. Vesicle fuses with pm, where sub carried within vesicle released. Signals trigger release of materials from vesicles. Proteins- synthesized in ribosomes linked to rer; completed proteins deposited into er lumen. Ves w/ proteins from rer golgi golgi. App, adds chemical tags (carbs, lipids, phosphate groups) , directing to proper location such as intracellular organelle or diff. cell or organ. Directed intracellularly to lysosome, endocrine hormones may be directed to cell mem for secretion into blood stream. Motor proteins attached to vesicles to move them along (cid:373)i(cid:272)rotu(cid:271)ules of (cid:272)ell"s (cid:272)ytoskeleto(cid:374) Exo move to correct location across pm.
