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cells.!
vocabulary cards for cells
25
Biology
9th Grade
10/18/2010

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Term
cell wall
Definition
provides and maintain shape of the cell;protective barrier
Term
cell membrane
Definition
protective barier that allows materials to enter and leave the cell
Term
nucleus
Definition
control center oh the cell; contains DNA
Term
nucleolus
Definition
structure inside the nucleus that produces ribosomes
Term
cytosol
Definition
semi-fluid part of the cytoplasm excluding the organelles; contains water, salts, proteins, and other molecules
Term
centrosome
Definition
area of the cell where microtubules are produced
Term
golgi
Definition
packages molecules like proteins and lipids and sends them to proper location in the cell
Term
lysosome
Definition
Contain hydrolytic enzymes that break down, or digest, cellular waste products
Term
Peroxisome
Definition
Contain oxidative enzymes that break down hydrogen peroxide, which is toxic to the cell, and fatty acids.
Term
Mitochondrion
Definition
Provide energy for the cell in the form of ATP
Term
Secretory Vesicle
Definition
contain hormones and neurotransmitters that are packaged at the Golgi and moved to the cell surface for release
Term
Vacuole
Definition
Plant cells - large; store water, nutrients, & waste; act like lysosomes in animal cells
Animal cells - small; digest and release cellular waste products
Term
Chloroplast
Definition
Contain chlorophyll, the green pigment in plants; allow plant to conduct photosynthesis
Term
Smooth Endoplasmic Reticulum
Definition
varies with specific cell type, but can include producing hormones, producing lipids, breaking down toxins in liver cells, and controlling calcium release in muscle cells
Term
Rough Endoplasmic Reticulum
Definition
contains ribosomes; prepares newly made proteins for transport to the cell
Term
Ribosomes
Definition
site of protein synthesis
Term
Ribosomes
Definition
site of protein synthesis
Term
Cytoskeleton
Definition
maintains cell shape; allows cell motility like movement of organelles, cell locomotion, and muscle contraction
Term
Capsule
Definition
protects cell, especially from attack by white blood cells
Term
flagellum
Definition
locomotion
Term
prokaryote
Definition
a microscopic single celled organism with no nucleus
Term
eukaryote
Definition
an organism consisting of a cell
Term
enzyme
Definition
a substance produced by a living organism that acts as a catalyst
Term
ATP
Definition
adenosine triphosphate
Term
catalyst
Definition
a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change
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