CHP3 Cellular Form and Function

CHP3 Cellular Form and Function

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Unformatted text preview: s (containing enzymes) Some lysosomes Some form secretory vesicles (packets of cell product that will Some secretory later be released into extracellular fluid…ex. digestive enzymes) later Organelles (cont.) Organelles Lysosomes= membrane-bound packets containing membrane-bound enzymes enzymes • Enclose ‘digestive’ enzymes that would be harmful to cell Enclose if came into direct contact if • Hydrolyze (split w/ H2O) proteins, nucleic acids, complex O) carbs, phospholipids, etc. carbs, • Liver: breakdown glycogen to release glucose into bldstream • WBC’s: breakdown engulfed (phagocytized) bacteria • Aide in cell maintenance by digesting ‘old, worn-out’ Aide organelles & cell structures= autophagy autophagy • Autolysis= cell programmed death; digestion of cells by their cell own lysosomal enzymes Organelles (cont.) Organelles Peroxisomes= similar to lysosomes but contain different similar types of enzymes…& not made by g.complex types • O2 oxidizes organic molecules, producing H2O2 + biproducts biproducts • H2O2 then oxidizes other molecules &/or is further broken down into H2O & O2 down • Detox alcohol, drugs, bld-borne toxins • Neutralize free radicals (unstable molecules w/ odd # of Neutralize e-) • Decompose fatty acids into 2-C acetyl groups used by Decompose mitochondria during ATP synthesis mitochondria Organelles (cont.) Organelles Mitochondria= 2-membrane bounded organelle specialized for ATP production…powerhouse of cell for • Inner membrane form ‘shelves’ (cristae) w/ matrix btw w/ matrix • Matrix= iinner space containing ribosomes, enzymes for nner ATP synthesis, & mtDNA • Insight 3.4- mitochondria evolved from aerobic bacteria Insight (during formation of eukaryotic cells); ‘mitochondrial Eve’ (during Centrioles= cylindrical assemblage of microtubules • Aides in cell division (mitosis) by forming mitotic spindle • Forms the basal body of flagellum or cilium (portion Forms attached to plasma membrane) attached Cytoskeletion= protein filaments & cylinders • Provide shape, structure, organization, movement of Provide cellular contents & entire cell cellular...
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This note was uploaded on 01/12/2014 for the course ZOO 250 taught by Professor Staff during the Fall '08 term at S.E. Louisiana.

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