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Biology chapt 7


Cell basic unit of all forms of life
cell theory idea that all living things are composed of cells. Cells are the basic unit of all forms of structure and function and new cells are produced from exiting cells
nuncleus the center of the atom which contains the protons and neutrons
eukaryote organisms whose cells contain a nuclei
prokaryote unicellular organism lacking nucleus
what are proteins assembled on? ribosomes
Chloroplasts capture light energy from sunlight and convert into chemical energy
organelle specialized structure that performs important cellular functions within a eukaryotic cell
cytoplasm material inside the cell membrane, not including the nucleus
nuclear envelope material of two membranes that surround the nucleus of a cell
chromatin granular material visible within the nucleus; consists of DNA tightly coiled around proteins
chromosome threadlike structure within the nucleus containing the genetic information that is passed from one generation of cells to the next
ribosome small particle in the cell on which proteins are assembled; made of RNA and protein
nucleolus small, dense region within most nuclei in which the assembly of protein begins
endoplasmic reticulum internal membrane system in cells in which lipid components of the cell membrane are assembled and some proteins are modified
Golgi apparatus stack of membranes in the cell that modifies, sorts, and packages proteins from the endoplasmic reticulum
lysosome cell organelle filled with enzymes needed to break down certain materials in the cell
vacuole salts, proteins, and carbohydrates
mitochondrion cell organelle that converts that chemical energy stored in food into compounds that are more convenient for the cell to use
chloroplast organelle found in cells of plants and some other organisms that captures the energy and converts into chemical energy
cytoskeleton network of proteins filaments within some cells that help the cell maintain its shape and is involved in many forms of cell movement
centriole one of two structures located in the cytoplasm of animal cells near nuclear envelope
What do all cells have? a cell membrane
Osmosis the diffusion of water through a selectivity permeable membrane
cell membrane thin, flexible barrier around a cell. Regulates what enters and leaves the cell
cell wall strong supporting layer around the cell membrane in plants algae and some bacteria
lipid bilayer double-layered sheet that forms the core of nearly all cell membranes
concentration the mass of solute in a given volume of solution or mass/volume
diffusion process by which molecules tend to move from an area where they are less concentrated to an area where they are less concentrated
equilibrium when the concentration of solute is the same throughout a solution
osmosis diffusion of water through a selectively permeable membrane
active transport energy requiring process that moves materials across a cell membrane against a concentration difference
What is the level of organization? individual cells, tissues, organs, and organ systems
cell specialization the process in which cells develop in different ways to perform different tasks
tissue group of similar cells that per for a particular functions
organ systems group of organs that work together to perform a specific function
Created by: RubySerenity