17 terms

KENT MS - 7th SCI Ch 3 Pt 2

STUDY
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cell wall
rigid wall around plant cells
cell membrane
flexible skin like rubber of a balloon; determines what gets in or out of cell
cytoplasm
liquid inside the cell membrane that everything floats in
cytoskeleton
animal cells only; framework made of proteins inside cytoplasm that give animal cells their shape
nucleus
control center of cell; directs cell's activities
chromatin
threads of DNA, the instructions the cell follows to do its job
nucleolus
makes ribosomes and sends them out to cytoplasm
mitochondria
convert food molecules into energy to run the cell; called the powerhouses of the cell
endoplasmic reticulum
often attached to nucleus; carries materials to different parts of the cell
ribosomes
tiny factories that help build proteins; float loose in cytoplasm
Golgi bodies
work with endoplasmic reticulum to deliver materials to different organelles in cell
vacuoles
bubbles or storage sacs which can be large or small
lysosomes
animal cells only; contain chemicals that break large molecules or old cell parts into smaller molecules; they digest things
centrioles
animal cells only; help pull apart the DNA when cells are splitting in two
chloroplasts
plant cells only; packets of green molecules called chlorophyll that capture energy from sun to help cell do photosynthesis and make food
nuclear envelope
holds together and protects the contents (nucleus)
organelles
carry out specific functions within the cell