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cells
| Question | Answer |
|---|---|
| cells | were the basic units of life |
| cell theory | confirmed by other biologist are summarized |
| nucleus | is a large membrane enclosed structure that contains the the cell genetic material |
| eukaryotes | are cells the contain nuclei |
| prokaryotes | are cells that do not contain nuclei |
| organelles | literally a little organs |
| cytoplasm | the portoin of the cell out side of the nucleus |
| nuclear envelope | composed of two membranes |
| chromtain | consist of dna bound proteins |
| chromosomes | these structures contain the genetic information that is passed fromn one genertaion to the next |
| nucleolus | nuclei also contain a small dense rergion known as |
| ribosomes | are small particles of rna and proiteinm found throughout the cytoplasm |
| endoplasmic reticulum | site where lipid compoents of the cell membrane are assembled along with proteins and other materials that are exported from the cell |
| golgi apparatus | protiens produced in the rough er move next into an oranelle |
| lysosomes | small organelles filled with enzymese |
| vacuoles | some kinds of cells contains saclike structures |
| mitochondria | are oranelles that convert the chemical energy storedin food in to compounds that are more convenient for the cell to use |
| chloroplasts | organelles tht capture the energy from sunlight and convert it into chemical energy |
| cytoskeleton | is a network of protein filaments tha thelps the cell to maintain its shape |
| centrioles | located near the nucleas and help to cell division |
| cell menbrane | surrounds the cell by a thin flexialbe barrier |
| cell wall | many cell also produce a srtong supporting layer around the membrane |
| lipid bilayer | comosition of nearly all cell membranes is a double-layered |
| concentration | a solution is the mass of solute in a given volume of solution ,or mass /volume |
| diffusion | particles tend to move from an area where they are more concentrated to an area where they are less concentrated |
| equilibrium | concentrtion of thesolute is the same throughout a system the system has reached |
| osmosis | is the diffusion of water through a selectivly permeable membrane |
| isotonic | water and sugar will be the same on both siudes of the membrane |
| hypertonic | when the experimentbegan the more concertrated sugar solution above strength as comparedto the dilute sugar solution |
| hypotonic | the dilute sugar solution was below strength |
| facilitated diffusion | these cell membrane channels are also said to facilitate or help the diffusion of glocose across the membrane |
| active transport | powerful as diffusion is cell somtimes must move materials in h oppsite direction against a concentration difference |
| endocytosis | is the proces of taking material into the cell by mean s of infoldings or pockets of the cell membrane |
| phagocytosis | extensions of cytoplasm surround a particle and package it within a food vacuole |
| pinocytosis | tiny pockets from along the cell membrane fiull with liquid and pich off to form vacuoles within the cell |
| exocytosis | many cells also release large of material from the cell |
| cell specialization | cell through out an organism can develop in different way to perform different tasks |
| organ | many gruops of tissues work together |
| organ system | a group pf organs that work together to perform a specific function |