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Chapter 4 Vocabulary
basic cellular vocabulary
27
Biology
9th Grade
09/17/2008

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Term
Cell
Definition
Smallest unit that can do all of life's processes
Term
Plasma Membrane
Definition
Covers cells, acts as barrier
Term
Cytoplasm
Definition
Everything but the nucleus
Term
Cytosol
Definition
Cytoplasma that includes molecules and small parts
Term
Nucleus
Definition
DNA and controls processes
Term
Organelles
Definition
Well-defined bodies that do certain tasks
Term
Cell Theory
Definition
-All LT have one or more cells
-Cells are basic units of structures & function in organisms
-Come only from repro of preexisting cells
Term
Prokaryote
Definition
No membrane-bound nucleus/organelles
Term
Eukaryote
Definition
M-B nucles & organelles
Term
Tissue
Definition
Group of cells doing same things
Term
Organ
Definition
Group of tissues doing same thing
Term
Organ System
Definition
Group of organs doing same task
Term
Phospholipid Bilayer
Definition
Dbl layers of lipis and phosphorus that makes up plasma & organelle membranes
Term
Chromosomes
Definition
Made of DNA and protein and controls functions
Term
Nuclear Envelope
Definition
Dbl layers of PLBL around EK nucleus
Term
Nucleolus
Definition
Concentrated DNA in nucleus
Term
Mitochondria
Definition
Organelles that transfer organic energy from organic material to ATP
Term
Ribosomes
Definition
OL of protein & RNA that directs protein synthesis
Term
Endoplasmic Reticulum
Definition
System of membranes that helps in making, processing, and transport of lipids
Term
Golgi Apparatus
Definition
OL that help in making & packaging materiales that travel in cells
Term
Lysosomes
Definition
OL that have digestive enzymes and are in GA
Term
Cytoskeleton
Definition
Cytoplasmic network of protein filamentes & tubes that help in movement, shapes, and mitosis
Term
Cilium
Definition
Hairlike structures in cells that help them move
Term
Flagellum
Definition
Long, whiplike forms that help in movement
Term
Centriole
Definition
OL of 2 short microtubes @ 90, mitosis
Term
Microtubule
Definition
Small tubular fibers of protein tubuilin in EK cells, compose: cytoskeleton, structure, & movement
Term
Microfilament
Definition
Fiber in EK cells composed mainly of protein actin, helps in structure & movement
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