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GenBio cells ch 2
cell structure and function for beginners
| Term | Definition |
|---|---|
| Cell membrane | protective phospholipid bilayer- controls what enters and exits the cell |
| semipermeable membrane | a membrane that only allows some things to enter or exit. |
| cytoplasm | the liquid interior of the cell |
| organelles | the parts that make up the cell |
| cell wall | tough outer protective layer in plants and some bacteria but NOT in animals |
| nucleus | the control center of the cell. DNA is housed here |
| chloroplasts | take sunlight and transform it into food. these are found in plant cells |
| mitochondria | the powerhouse of the cell. These break down food to make energy for plants and animals by cellular respiration |
| ribosomes | synthesize proteins |
| proteins | do the work for the cell |
| rough endoplasmic reticulum | synthesizes lipids and proteins and sends them to the golgi |
| golgi | modifies lipids and proteins and ships them out of the cell |
| lysosome | clean up the cell- gets rid of old or dead organelles |
| tissue | many cells working together |
| cell | the smallest unit of life |
| organ | many tissues working together |
| organ system | many organs working together |
| organism | an individual living thing |
| prokaryote | cells without a nucleus and without membrane bound organelles |
| eukaryote | cells with a nucleus that contain membrane bound organelles |
| examples of prokaryotes | bacteria |
| examples of eukaryotes | plants, animals, fungus and protists |