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Biology

WCHS Biology Chapter 8

WordDefinition
Osmosis The diffusion of water across a selectively permeable membrane
Isotonic solution The concentration of dissolved substances in the solution is the same as the concentration of dissolved substances inside the cell
Hypotonic solution The concentration of dissolved substances is lower in the solution outside the cell than the concentration inside the cell
Hypertonic solution The concentration of dissolved substances outside the cell is higher than the concentration inside the cell
Passive transport The movement of particles across the membrane
Facilitated diffusion Passive transport of materials across the membrane using transport proteins
Endocytosis A process by which a cell surroundsand takes in material from its environment
Exocytosis The expulsion or secretion of materials from a cell
Chromosomes Structures that contain DNA and become darkly colored when stained
Cell cycle The sequence of growth and division of a cell
Interphase During this process a cell grows in size and carries on metabolism while chromosomes are duplicated in preparation for the period of division
Mitosis The process by which two daughter cells are formed, each containing a complete set of chromosomes
Prophase The first and longest phase of mitosis, the long, stringy chromatin coils up into visible chromosomes
Sister Chromatids The two halves of the doubleed structure
Centromere Plays a role in chromosome movementduring mitosis
Centrioles Small, dark, cylindrical structures that are made of microtubles and are located just outside the nucleus
Spindle A football-shaped, cagelike structure consisting of thin fibers made of microtubules
Metaphase The short second phase of mitosis
Anaphase The third phase of mitosis
Telophase The final phase of mitosis
Cytokinesis Following telophase, the cell's cytoplasm divides in this process
Tissue Groups of cells that work together to perform a specific function
Oragns Group of two ore more tissues organized to perform a specific life function
Oragn System Multiple organs that work together
Cancer A malignant growth resulting from uncontrolled cell division
Created by: dmoudy
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