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science quiz

use as frequently as possible

Organization of SYtems cell tissue organ organ system organism
organism anything that can live on its own
cell membrane covered structure that contains all the materials necessary for life
tissue group of cells that work together to perform a specific job
organ two or more tissues working together to perform a specific job
organ system group of organs working together ie) digestive,reparatory
Robert hooke saw first(dead) cells in cork
anton van leewenhook first observed living cells in pond water
all organisms are composed of one of more cells
cell is the basic unit of life in all living things
all cells come from other cells
cells are small because the surface is not large enough to bring in enough______ or get rid of enough _________ to keep cell alive nutrients,waste
Inside grows ______ than the outside inside is volume and outside is the surface area faster
Big or ________ organisms have the same size of cells small
no nucleus to contain DNA; it floats around i.e. bacteria prokaryote
eukaryote have no nucleus which contains DNA i.e. animal cells
organelles little organs of function
cytoplasm jellylike material that surrounds organelles
cell membrane allows nutrients and waste to move into and out of the cell
nucleus (2 answers) -largest organelle -stores DNA-deoxyribonucleic acid: contains all the information to tell the organisms to tell the cell what to do.
nucleolus in nucleus stores material used to make ribosomes
ribosomes smallest and most abundant organelle where amino acids hook together to make proteins
endoplasmic reticulum sacks and tunnels of membranes that carry substances to outside of cell
types of endoplasmic reticulum rough-covered with ribosomes; transport proteins smooth- is not covered with ribosomes
more info about endoplasmic recticulum ( I know its not a question) -found a lot in cells that make proteins, lipids ,and enzymes -break down chemicals that harm cells
Golgi bodies flattened stacked membranes -changes lipids and proteins, pinches them off into sacks (vesicles) and ships them out of the cell.
what's a vesicle membrane bound structure that carries substances from Golgi bodies (sack)
lysosomes contain digestive enzymes breakdown old cells and bacteria, "garbage trucks of the cell"
more about lysosomes white blood cells have a lot of lysosomes because they attack bacteria
mitochondria( Ms.fabish's fav) energy is released in this organelle from glucose being broken down -active organs like muscles have more mitochondria
Cristae have inner folds that increase the surface area so more glucose can be broken down and more energy (ATP) released
Plant cells have some organelles that animal cells don't have
cell wall made of cellulose, tough and rigid
chloroplasts contain chlorophyll-green pigment absorb sunlight where volume occurs and glucose (sugar) is made
vacuoles sack that contains water, waste material, food makes up most of cells volume
shape of animal and plant cells animal cell: usually round plant cell: square
microscope magnifies objects -magnification: how much larger a specimen is when using a microscope
Created by: 22mlee