cell anatomy and division
Terms
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- 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 - 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