BIOL302 Study Guide - Epididymis, Cell Adhesion, Aaron

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Document Summary

High magnification = looking for small structure. Membrane: function barrier to allow transport of molecules, energy sources, signals (molecular exchange) Organelle membrane bound, determines cell function. Cell membrane regulate molecular interactions: molecular exchange for osmotic regulation, adhesion to cell-cell and cell-matrix, motility, communication and signalling, type of junctions present indicate cell function. Nucleus genomic container (<20% = dna), rna synthesis, dna replication, ribosome assembly. Nucleolus non-membrane bound, site of ribosome assembly, active transport via pores. Mitochondria extensive folding (cristae) = increase surface area for greater atp production. Rough er translate protein on membrane. Smooth er synthesis, packaging, sarcoplasmic reticulum in muscle store ca++, hormone synthesis. Golgi complex secretion, mod protein from er (glycosalation for protection from degrade) Endocytosis active process bring molecule into cell (signals, nutrients, bacteria) Tissue = cells w/ same elements, in communities. Mucous secreting cells face apical: apical specializations.