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Ch 7 Cells
cells
31
Biology
10th Grade
02/21/2012

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Term
active transport
Definition
movement of materials that need energy
Term
cell membrane
Definition
thin, flexible barrier around a cell, regulates what enters and leaves the cell
Term
cell specialization
Definition
process in which cells develop in different ways to permform different tasks
Term
cell theory
Definition
all living things have cells, cells are the basic unit of life, cells come from other living cells
Term
cell wall
Definition
provides structure and support around cell membrane of plants, fungi and some bacteria
Term
cells
Definition
the basic unit of life
Term
chloroplast
Definition
organelle containing chlorophyll, site of photosynthesis
Term
chromosomes
Definition
DNA in the cell
Term
concentration
Definition
the amount of solute in a solution
Term
cytoplasm
Definition
material inside the cell memebrane, not in nucleus
Term
diffusion
Definition
process by which molecules(particles) move from high to low concentration
Term
endocytosis
Definition
into the cell
Term
equilibrium
Definition
concentrations are equal on both sides
Term
eukaryote
Definition
a cell that contains a nucleus
Term
facilitated diffusion
Definition
movement of specific molecules across cell membranes through protein channels
Term
hypertonic
Definition
the solution has greater concentration of solutes, cell shrivels
Term
hypotonic
Definition
the cell has greater concentration of solutes, cell swells
Term
isotonic
Definition
the concentration of two solutions are the same
Term
lipid bilayer
Definition
cell membrane
Term
lysosomes
Definition
cell organelle filled with enzymes to cleam up old or dead cell parts
Term
mitochondria
Definition
powerhouse of the cell, organelle that is the site of ATP (energy)
Term
nucleus
Definition
contains DNA(can not leave), controls cells
Term
organ
Definition
a collection of tissue
Term
organelles
Definition
small membrane bound structures in the cytoplasm that do special jobs
Term
osmosis
Definition
movement of water from low to high concentration
Term
passive transport
Definition
needs no energy to move (diffusion, osmosis, facilitated diffusion)
Term
cilia
Definition
small hair like projections for movement in animal and bacteria cells
Term
flagella
Definition
tail like projections for movement in animal and bacteria cells
Term
ATP
Definition
energy made by the mitochondria
Term
chlorophyll
Definition
green pigment in plants that trap sunlight
Term
ribosomes
Definition
makes protein (protein synthesis)
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