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Cells

Every term in chapter 7

QuestionAnswer
Cell Basic unit of life
Cell theory Fundamental concept of biology that states- All living things are composed of cells, cells are the basic unit of structure and function in living things and new cells are produced from existing cells.
Nucleus A large membrane-enclosed structure that contains the cells genetic material in form of DNA.
Eukaryote Cells that contain nuclei.
Prokaryote Cells that do not contain nuclei.
Organelle Cells that act as if they are specialized organisms.
Cytoplasm The portion of the cell outside the nucleus.
Nuclear envelope The cooating around cell that allows material to move in and out of the cell.
Chromatin The granular material seen in nucleus. Consist of DNA bound to protein.
Chromosomes The granular material seen in a nucleus.
Nucleolus The small, dense region in a nuclei.Where ribosomes begins.
Ribosomes Small particles of RNA and protein found throughout the cytoplasm. Produces protein by following coded instructions that came from the nucleus.
Endoplasmic Reticulum The site where lipid components of the cell membrane are asssembled, along with proteins and other materials that are exported from the cell.
Golgi Apparatus The function of the golgi apparatus is to modify, sort, and package proteins and other materials from the endoplasmic reticulum for storage in the cell or secretion outside the cell.
Lysosomes Small organelles filled with enzymes.Break down lipids.
Vacuoles Sacklike structures that store materials such as water, salts, proteins, and carbs.
Mitochondria Organelles that convert the chemical energy stored in food into compounds that are more convenient for the cell to use.
Chloroplasts Organelles that capture the energy from sunlight and convert it into chemical energy in a process called photosynthesis.
Cytoskeleton Supporting structure that gives eukaryote cells their shape and internal organization.
Centrioles Located near the nucleus and organise cell division. Not found in plant cells.
Cell Membrane Sometimes called the plasma membrane because many cells in the body are in direct contact with the fluid portion of the blood-the plasma.
Cell Wall Strong supporting layer in a cell around the membrane.
Lipid bilayer The double layered sheet composition of nearly all cell membranes.
Concentration The mass solution in a given volume of sollution, or mass/volume.
Diffusion When particles move from a more concentrated area to a less conentrated area.
Equilibrium The concentration of a solute is the same througout a system it reaches equilbrium.
Osmosis The diffusion of water through a selectively permeable membrane.
Isotonic When solutions (water and sugar)will be same on both sides of membrane. Means "same strength"
Hypertonic The more concentrated sugar. "more strength"
Hypotonic
Created by: jsolis on 2011-10-17



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