Vocabulary Vocabulary ReviewReview
CellsCells
Process by which a cell engulfs
droplets of fluid from its
surroundings
Pinocytosis
Physiological process by which substances may
move through a cell membrane; involves
the formation of tiny, cytoplasmic
granulesEndocytosis
Diffusion of water through a selectively permeable membrane
Osmosis
Process that requires an
expenditure of energy to move a
substance across a cell membrane
Active Transport
Condition in which a solution contains
a lesser concentration of
dissolved particles than the solution
to which it is comparedHypotonic
Cytoplasmic organelle that
consists largely of RNA and functions in the synthesis of
proteins
Ribosome
Process by which body cells divide
to form two identical cells
Mitosis
Cytoplasmic organelle that
contains digestive enzymes
Lysosomes
A state of balance between two
opposing forces
Equilibrium
Membranous cytoplasmic sac
formed by an action of the cell
membrane
Vesicle
Process by which a cell engulfs and
digests solid substances
Phagocytosis
Nuclear material that gives rise to
chromosomes during mitosis
Chromatin
Diffusion in which substances are moved through
membranes from high to low
concentration by carrier molecules
Facilitated Diffusion
The contents of a cell surrounding
its nucleus (cytosol +
organelles)
Cytoplasm
A cellular organelle that is enclosed by a
double-layered membrane and contains DNA – “Brains of the
operation”
Nucleus
Cellular organelle consisting of two centrioles; form
spindle for mitosis
Centrosome
A small structure that occcurs within
the nucleus of a cell and contains RNA and proteins
Nucleolus
Random movement of
molecules from high to low
concentration
Diffusion
Rod-like structure that appears in
the nucleus during mitosis; contains genes responsible
for heredity
Chromosome
Open to passage or penetration
Permeable
Condition in which a solution contains
a greater concentration of
dissolved particles than the solution with which it is
comparedHypertonic
Process by which cells become
structurally and functionally
specialized during development
Differentiation
A solution that has the same
concentration of dissolved particles
as the solution with which it is
compared
Isotonic
Cytoplasmic organelle that
contains enzymes responsible for
aerobic respiration;
produces ATP ~ “powerhouse”
Mitochondrion
Cytoplasmic organelle
composed of a system of
interconnected membranes, tubules, and vesicles for transporting
materialsEndoplasmic
reticulum
A cytoplasmic organelle that functions in
preparing cellular products for
secretion
Golgi apparatus
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