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bio chapter 4
| Question | Answer |
|---|---|
| what is a light microscope | when visible light is projected through the specimen |
| magnification | increase in the objects apparent size compared to it's actual size |
| resolving power | the abiltiy of an optical instrument to show two objects are separate |
| electron microscope | shoots a beam of electrons through the speiciman |
| scanning electron microscope | good for studying the surface |
| prokarotic cells | from the domanins bacteria and archaea |
| eukaryotic cells | protist plants fungi and animals |
| plasma membrane | which regulates the traffic of molecules between the cell and its surroundings |
| organelles | membrane enclosed structires that preform sepcific functions |
| nucleus | holds all the dna |
| cytoplasm | the region between the nucles and the plasma membrane |
| chromatin | stuff inside the nucleus-long Dna molecules with fibers |
| nuclear envelope | nucleas is bordered by me |
| chrmosome | eacy long chromatin fiber |
| nucleolus | a prominent structure inside the nuclues where ribsomes are made |
| ribsomes | responsible for protien synthesis |
| endomembrane system | this sustem inclueds the nuclear encelppe the endoplasmi reticulum the golgi apparatus lysomes and vacuoles |
| endoplasmic retiulum | one of the main manufacturing facilites within a cell produces an enormous variety of molecules |
| rough ER | refers to the appearatice of this organelle in electron micro graphs |
| transport cesivles | membranceous spheres that bud from the rough ER |
| smooth ER | refers to the fact that this organeelle lacks the ricosomes that popilate the surface of rough ER |
| golgi apparatus | refinary werehouse and shipping center |
| lysosomes | sac of digestice enzymes in an animal cell |
| food vauoles | many cells engulf nutrients into tiny cytoplasmic sacs called this |
| central vacuole | stores organic nitrients such as proteins |
| chloroplast | helps photosynthesis |
| stroma | a thick fluid within the chloroplast |
| grana | tack the sun's energy |
| mitochondria | are the sites of cellular respiration a process that harvests energy from sugars and other foods |
| cristae | inner membrane |
| matrix | an envelopes of two membranes enclosed the mitochondrial |
| crtoskeleton | network of fiber extending throughout the cytoplasm |
| microtubules | made from the different types of proteins |
| flagella | propel the cell |
| cilia | are generlly shorter and more numerous than flagella |