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Chapter 2
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37
Anatomy
Not Applicable
02/04/2011

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Term
Cell Theory
Definition
Cells are the structural building blocks of all organisms. Cells are only produced from existing cells. Cells are the smallest structural unit that preforms vital functions.
Term
Cell Membrane Structure
Definition
Thin, composed of phospholipids, proteins, glycolipids, and cholesterol, has a phospholipid bilayer.
Term
Cell Membrane Functions
Definition
Separates intracellular fluid from extracellular fluid, controls entry and exit of substances, and gives tissue a stable structure.
Term
Passive Transport
Definition
Movement without ATP
Term
Active Transport
Definition
Movement with ATP
Term
Types of passive transport (4)
Definition
Diffusion, osmosis, filtration, and facilitated diffusion.
Term
Types of Active Transport (2)
Definition
Endocytosis and Exocytosis
Term
Diffusion
Definition
Movement from high concentration to low concentration.
Term
Osmosis
Definition
Diffusion of water
Term
Filtration
Definition
Solutes move across membrane with water.
Term
Facilitated Diffusion
Definition
Special Carrier proteins transport large molecules.
Term
Endocytosis
Definition
Materials into the cell.
Term
Types of endocytosis (3)
Definition
Pinocytosis, phagocytosis, and receptor-mediated endocytosis.
Term
PInocytosis
Definition
Cell Drinking
Term
Phagocytosis
Definition
Cell eating
Term
Receptor-mediated endocytosis
Definition
specific molecules are brought into the cell,
Term
Exocytosis
Definition
Materials transported out of the cell.
Term
Cytosol
Definition
Intracellular fluid. HIgh in potassium and proteins, amino acids and lipids, low in carbohydrates.
Term
Intercellular Attachments
Definition
Cell junctions
Term
Tight junction (zonula occludens)
Definition
Block passage of water and other substances between cells.
Term
Zonula Adherens
Definition
Occurs as a sheet between cells.
Term
Macula adherens
Definition
strong, resist stretching and twisting.
Term
Gap junctions
Definition
Allows for passage of small molecules.
Term
Cytoskeleton (Structure)
Definition
Microfilaments, microtubules, intermediate filaments, and thick filaments
Term
Cytoskeleton (Function)
Definition
Gives cell strength and flexibility.
Term
MIcrovilli (Structure and function)
Definition
Finger like projections on cell membranes. Increase surface area and involved in absorption.
Term
Centriole, Cilia, and Flagellum (structure)
Definition
Made of microtubules. Cilia have a 9+2 arrangement.
Term
Centriole (function)
Definition
Important for cell division.
Term
Cilia (function)
Definition
Move secretions or fluid.
Term
Ribosomes (structure)
Definition
Small dense granules, contain mainly RNA.
Term
Ribosomes (Function)
Definition
Manufacture proteins.
Term
Mitochondria (structure)
Definition
Double membrane and inner folds (cristae)
Term
Mitochondria (function)
Definition
Produces cell energy.
Term
Nucleus
Definition
Determines structural and functional characteristics.
Term
Endoplasmic Reticulum (structure and function)
Definition
Intracellular membranes. Synthesize carbs, lipids, and proteins. Stores molecules, and transports.
Term
Golgi Apparatus (structure and function)
Definition
Membranous plates. Synthesizes and packages secretions.
Term
Lysosomes (structure and function)
Definition
Vesicles in Golgi Apparatus. Removes bacteria.
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