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21 Cards in this Set
- Front
- Back
|
cells
|
the basic, smallest structural and
fucntional unit of all organisms |
|
|
cells 3 major regions
|
nucleus, cytoplasm
plasma membrane |
|
|
organelle
|
metabolic machinery of cell
"small organ" |
|
|
cells common
functions |
maintain boundries,metablize,
digest nutrients, dispose waste, grow, reproduce and respond |
|
|
nucleus
|
control center of
cell |
|
|
chromatin
|
genetic material throughout
the nucleus in threadlike form |
|
|
chromosomes
|
darkly staining rodlike bodies
when cells is dividing to form daughter cells |
|
|
nucleoli
|
1 or more round bodies in
nucleus primarily proteins and rna. protein sythesizing factories |
|
|
nuclear envelope
|
double layered porous
membrane circling nucleus |
|
|
plasma membrane
|
separates cell contents
from the surounding enviroment main structures are phospholipids (fats) and protein |
|
|
selective permeability
|
property of membrane to
allow and restrict the passage of certain substances |
|
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active transport
|
cell must provide energy
ATP to power transport process |
|
|
passive transport
|
process driven by concentration
or pressure differences |
|
|
microvilli
|
minute fingerlike projections
or folds |
|
|
cytoplasm
|
cell contents outside the
nucleus. site for most activities of cell |
|
|
cytosol
|
cytoplasmic fluid
material |
|
|
inclusions
|
various other substances and
structures in cytoplasm (stored food pigment granules) not part of active metabolic machinery |
|
|
cells life cycle
|
2 stages interphase
and cell division |
|
|
mitosis
|
nuclear division
|
|
|
cytokinesis
|
division of cytoplasm
|
|
|
binucleate or
multinucleated cells |
cytoplasmin division
does not occur |
