Chapter_4_Outline_Part_II_

Chapter_4_Outline_Part_II_ - Chapter 4 Cell Structure &...

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Chapter 4 Part II Biol 1001 Spring 2012
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Components of the Cytoplasm System of membranes endoplasmc reticulum golgi apparatus vesicles (eg lysosomes) Vacuoles food vacuoles contractile vacuoles central vacuole mitochondria chloroplasts plastids mitochondrion cytoplasmic fluid flagellum vesicle ribosomes on rough ER centriole Golgi apparatus cytoplasm lysosome polyribosome nuclear pore basal body nuclear envelope chromatin (DNA) nucleolus nucleus plasma membrane Rough endoplasmic reticulum free ribosome Smooth endoplasmic reticulum Fig 4-3
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System of Membranes fluid membranes fused with one another Create separate, specialized compartments within cell Compartments capable of: Interconnecting with each other Exchanging pieces with each other Transferring contents amongst each other Utilizes vesicles(=membrane bound sacs) to move contents to Other compartments or entirely out of cell Functions separate biochemical reactions from one another enable a variety of different molecules to be processed
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Endoplasmic Reticulum (ER) Series of interconnected membranes Network of flattened sacs & tunnels Function contain enzymes for detoxification & acquiring energy storage of calcium 2 Types smooth endoplasmic reticulum (smooth er) rough endoplamic reticulum (rough er)
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Smooth ER lack ribosomes Specialized activities synthesized lipids (steroids, phospholipids) Contain enzymes for detoxification Abundant in liver cells! Contain enzymes to get energy from glycogen Stores calcium large amounts needed for muscle contractions
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Rough ER ribosomes attached Functions Site of protein synthesis Ex: embedded proteins in plasma membrane Ex: digestive enzymes Transport proteins through channels & vesicles to other organelles Proteins collect in pockets of membrane that bud off as vesicles
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ribosomes smooth ER smooth ER rough ER rough ER vesicles Rough ER with ribosomes Fig 4-11
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Golgi Apparatus / Complex stack of flattened, interconnected sacs Derived from endoplasmic reticulum Interact with vesicles from rough er Functions:
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Chapter_4_Outline_Part_II_ - Chapter 4 Cell Structure &...

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