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Chapter 3 Human bio

Cell Structure and Function

QuestionAnswer
What is the 6 functions of cells 1. Basic Unit of Life. 2. Protection and support. 3. Movement. 4. Communication. 5. Cell metabolism and energy release. 6. Inheritance
Organelles specialized structures perform specific functions
Cell Membrane outermost component of a cell, encloses the cytoplasm and forms the boundary between material inside the cell and material outside it
Extracellular substance substances outside the cell
intracellular substance substances inside the cell
Mosaic Model moving model
Nucleus brain of the cell
Nucleolus rounded, dense, well defined nuclear bodies with no surrounding membrane; subunits of the ribosomes are manufactured within the nucleolus
Rough ER with ribosomes attached to it
Smooth ER without ribosomes attached to it
Golgi Apparatus stacks of flattened sacks, formed by membranes, that collect, modify, package, and distribute proteins and lipids
Lysosome membrane-bound vesicle containing intracellular digestive enzymes
Mitochondrion small, spherical, rod-shaped or thin filamentous structure in the cytoplasm that is a major site of ATP production
Microtubules hollow tube composed of tubulin; microtubules help provide support to the cytoplasm of the cell and are components of certain cell organelles such as cilia and flagella
Cilia contains specialized microtubules enclosed by the cell membrane
Flagella whiplike locomotor organelle similar to cilia except longer, and there is usually one per sperm cell
Microvilli one of the minute projections of the cell membrane that greatly increase the surface area of the cell membrane
Ribosomes small, spherical, cytoplasmic organelle where protein synthesis occurs
Cytoskeleton the collection of microtubules, microfilaments, and intermediate filaments that support the cytoplasm and organelles; also involved with cell movements
Created by: lgregor
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