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Lab 4:the Cell: Anatomy and Divison Essay

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Lab 4


The Cell: Anatomy and Divison





Anatomy of the composite cell


1.Define the following terms:


organelle:


"small organs"; are the metabolic machinery of the cell, and that are highly organized to carry out specific functions for the cell as a whole.


Cell:


the structural and functional unit of all living things, is a complete entity.


2.Although cells have differences that reflect their specific functions in the body, what functions do they have in common?


Growing, reproducing, and responding to a stimulus are common functioning characteristics amongst all cells. In addition, all cells can maintain their boundaries, metabolize, digest nutrients, and dispose wastes.


3.Identify the following cell parts:


Plasma membrane - external boundary of cell; regulates flow of materials into and out of the cell; site of cell signaling


Lysosome - contains digestive enzymes of many varieties; "suicide sac' of the cell


mitochondria - scattered throughout the cell; major site of ATP synthesis


Microvilli - slender extensions of the plasma membrane that increase its surface area


Inclusions - stored glycogen granules, crystals, pigments, and so on


Golgi apparatus - membranous system consisting of flattened sacs and vesicles; packages protein for export


Nucleus - control center of the cell; necessary for cell division and cell life


Centrioles - two rod-shaped bodies near the nucleus; direct formation of the mitotic spindle


Nucleolus - dense, darkly staining nuclear body; packaging site for ribosomes


Microfilaments - contractile elements of the cytoskeleton


Rough ER or endroplasmic reticulum - membranous system; involved in intracellular transport of proteins and synthesis of membrane lipids


Ribosomes - attached to membrane systems or scattered in the cytoplasm; synthesize proteins


Chromatin or Chromatin -   threadsthreadlike structure in the...

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