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cell organelles
n/a
17
Biology
9th Grade
11/07/2011

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Term
cell membrane
Definition
composed of lipids and proteins, controls what enters and exits (selectively permeable)
"like our skin"
Term
cytoplasm
Definition
jellylike material that surrounds organelles; contains water and dissolved organic molecules
"like our blood"
Term
cytoskeleton
Definition
internal fibers that support the cell membrane and help keep cel shape
"like our bones"
Term
nucleus
Definition
stores information (genes) for the production of proteins and controls all the activities in the cell
"like our brain"
Term
nucleolus
Definition
small circular structure inside the nucleus where ribosomes are made
Term
ribosomes
Definition
numberous organelles; site where proteins are made
Term
eukaryote
Definition
cell that contains a nucleus
most common type
bigger than prokaryote
Term
prokaryote
Definition
cells that do not contain a nucleus
*bacteria only
Term
endoplasmic reticulum (ER)
Definition
system of tunnerls used in transporting materials
Term
smooth ER
Definition
no ribosomes attached, makes and transports lipids
Term
rough ER
Definition
has ribosomes attached, transports proteins made by ribosomes
Term
golgi bodies
Definition
receives proteins made by ribosomes and packages them to be sent out of the cell
"like a post office"
Term
mitochondria
Definition
"power house" of the cell, site of cellular respiration, food and oxygen is turned into energy (ATP)
"my favorite organelle"
Term
lysosomes
Definition
contain enzymes, break down old cell parts, wastes and foreign materials
"like our liver and spleen"
Term
**Central vacuoles
Definition
store water and waste products
important in plants--helps them stand up PLANTS ONLY!!!
Term
**cell wall
Definition
hard cullulose covering of plant cells; provides support; also has small openings=pores PLANTS ONLY!!!
Term
**chloroplasts
Definition
contain chlorophyll, used in photosynthesis PLANTS ONLY !!!
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