Download 4th 6 Weeks Vocabulary Word Wall

4th 6 Weeks Vocabulary
Word Wall
2011-2012
Cell Theory
Extract
• a substance made
by extracting a
part of a raw
material, often by
using a solvent
such as ethanol or
water.
Organ
• A group of
tissues that
perform a
specific
function or
group of
functions.
Organ System
• A group of
organs that
work together
to carry out a
particular task.
Organism
• a living
things that
contributes
to the
ecosystem.
Tissue
• a group of
cells that
perform a
similar
function
Cell Membrane
• membrane around
cell: the membrane
that surrounds the
cytoplasm, through
which substances
pass in and out of
the cell
Cell Wall
• the tough,
usually flexible
but sometimes
fairly rigid layer
that surrounds
some types of
cells.
Chloroplast
• organelles found
in plant cells and
other eukaryotic
organisms that
conduct
photosynthesis.
Cytoplasm
• small gel-like
substance residing
between the cell
membrane holding
all the cell's internal
sub-structures
(called organelles),
except for the
nucleus.
Nucleus
• central part of living
cell: the central body,
usually spherical, within a
eukaryotic cell, that is a
membrane-encased
mass of protoplasm
containing the
chromosomes and other
genetic information
necessary to control cell
growth and reproduction
Mitochondria
• a small round or
rod-shaped body
that is found in the
cytoplasm of most
cells and produces
enzymes for the
metabolic
conversion of food
to energy
Organelle
• a specialized
part of a cell
that has its
own function
Vacuole
• A small cavity in
the cytoplasm of a
cell, bound by a
single membrane
and containing
water, food, or
metabolic waste.
Radiant Energy
• Energy
transferred by
radiation,
especially by an
electromagnetic
wave
Photosynthesis
• the process of
converting light
energy to
chemical energy
and storing it in
the bonds of
sugar.
External
• of or
pertaining to
the outside or
outer part;
Fight or Flight
• A set of
physiological
changes, such as
increases in heart
rate, arterial blood
pressure, and
blood glucose,
initiated by the
sympathetic
nervous system
Geotropism
• The growth
of a living
organism in
response to
gravity,
Hydrotropism
• movement
influenced by
water: movement
by a plant part
such as a root
toward or away
from a source of
water
Phototropism
• the growth of
a plant in the
direction of
its light
source.
Response
• any behavior of
a living
organism that
results from an
external or
internal
stimulus.
Stimulus
• Something
causing or
regarded
as causing
a response
Thigmotropism
• a movement
in which an
organism
moves or
grows in
response to
touch or
contact
stimuli.
Equilibrium
• the condition of
a system in
which competing
influences are
balanced.
Homeostasis
• a state of equilibrium or a tendency to reach
equilibrium, either metabolically within a cell or
organism or socially and psychologically within
an individual or group
Internal
• located inside:
located within or
affecting the
inside of
something,
especially the
inside of the
body
Wilting
• droop or
shrivel: to droop
or shrivel
through lack of
water, too much
heat, or disease,
or make a plant
droop or shrivel
Emergence
• The act or
process of
emerging
Turgor Pressure
• the main
pressure of
the cell
contents
against the cell
wall in plant
cells and
bacteria cells