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chapter3
parts of cells, virus, mitosis, active and passive transport
46
Science
7th Grade
12/19/2005

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Term
cell membrane
Definition
outermost boundrie controls what enters and leaves cell- animal and plant cell
Term
cytoplasm
Definition
gel like substance fills area within membrane holds many other structures -animal and plant cell
Term
nucleus
Definition
"brain" of cell contain chromosones --both cells
Term
nuclear membrane
Definition
boundry surounding nucleus controls what enters and leaves-both cells
Term
Mitochondria
Definition
energy power house of cell ATO stored here-both cells
Term
ribosomes
Definition
place where proteins are made-both cells
Term
endoplasmic reticulum
Definition
tube like transprt system in cytoplasm also seperates reactions-both
Term
golgi bodies
Definition
package products of cells for movement-both
Term
vacuoles
Definition
storage areas of cell-both
Term
cell wall
Definition
rigid support system outside cell membrane-PLANT ONLY
Term
chloroplasts
Definition
contain chlorophyll for photosynthesis-PLANT ONLY
Term
organelle
Definition
structure that makes up a cell
Term
centrosome
Definition
with centriole, forms poles of spindle in mitosis-animal cell only
Term
cytoskeleton
Definition
holow tubes of proteins and thin solid protein fiber, in cytoplasm, framework of cell, keeps its shape
Term
Lysosomes
Definition
in cytoplasm, enzymes are stored here to take apart food molecules wastes and worms
Term
the formula for anaerobic respiration
Definition
glucose makes 2ATP + carbondioxide+ alchohol or acid
Term
which organisms only go through anaerobic respiration
Definition
yeast bacteria go through this process
Term
Anaerobic
Definition
without energy
Term
aerobic respiration
Definition
using oxygen
Term
oxygen + glucose = carbon dioxide + water and also 36 ATP
Definition
aerobic respiration
Term
respiration formula
Definition
glucose(+ oxygen) ==> ATP + carbon dioxide (+water alchohol acid)
Term
Photosynthesis formula
Definition
Carbon dioxide +water -->(using sun energy) glucose+ Oxygen gas
Term
cell
Definition
smallest living unit all living things are made out of
Term
are viruses particles of cells
Definition
particles
Term
Viruses can be seen if...
Definition
electron microscope
Term
4 stages of active viruses are
Definition
attach, invade, copy, release
Term
latent virus steps
Definition
inject, nucleic acid becomes part of host DNA, Host cell, viral DNA or RNA leaves host chromosomes and becomes active
Term
active transport
Definition
energy required to move materials usually movement from lover concentration to higher concentration
Term
passive transport
Definition
movement of molecules without energy
Term
osmosis
Definition
diffusion of water accross a cell membrane until an equilibrium is reached
Term
diffusion
Definition
movement from greater concentration to lesser concentration until an equilibrium is reached
Term
cell membrane looks like this
Definition
[image]
Term
endocytosis
Definition
pulls it into cell; energy required
Term
exocytosis
Definition
duming of materials outside cell energy required
Term
double chromosome
Definition
2 chromotids
Term
chromotid
Definition
chromosonw but called chromotid when doubled
Term
centromere
Definition
middle conecting point
Term
in animal cell there are...which there are not in plant cells
Definition
centrioles
Term
poles
Definition
made of centrioles
Term
equatorial plate
Definition
middle of spindle
Term
5 phases of mitosis
Definition
interphase, prophase, metaphase, anaphase,telophase
Term
interphase
Definition
cannot see chromosones : nucleus visable: chromosones replicate;
Term
prophase
Definition
nucleus disapears; centriole doubles and one moves to either side of disapearing nucleus; spindle forms; chromosones appear and are doubleing; each made of 2 chromotids
Term
metaphase
Definition
chromosones line up on spindle at equatorial plate
Term
anaphase
Definition
chromotids pull apart; 1 member from each pair goes to each pole; centomere leads chromatid now called chromosone
Term
telophase
Definition
chromosones reach poles;spindle disapears; cell divides to form two new cells; each cell has half the chromatids but full number chromosones; nucleus will reappear in each cell and chromosones will fade from view
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