cells and stuff
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| what are some things that make something living? | it reprodues, reacts, it grows, and it moves
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| are trees living? | yes
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| robots are living? | no
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| what is a eukaryoyic cell? | a plant or animal cell that has a membrane around the nucleus and their organelles
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| what are prokaryotic cells? | they are cells that have no membrane around their DNA
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| what is the cell theory? | 1. the cell is the basic unit of life. 2. all organisims are composed of one or more cells. 3. all cells come from previosly existing cells
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| what is the cell membrane? | a thin porous layer that surounds and seperate the inside of a cell from its suroundings. it also controls the flow of materials in and out of the cell
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| what is the cytoplasm? | a jelly like substance that contains organelles, water, and life suporting materials
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| what is the nucleus? | it is the most inportant organelle because it contains the DNA. it also controls all activities in the cell
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| metabolism is... | the total of all chemical reactions that take inside of a cell
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| ribosomes are... | a very tiny structres attached to the endoplasmic reticulum (ER), and their function is to asemble protiens
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| what is the ER? | a network of conected chanells that look like folds in a acordien. it stores and delivers protiens in a cell
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| what is the lysosome? | a small structure that breaks down cemicly worn out organelle. lysosome contains digestive chemicals to help the decomposition of a organelle
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| what is the cell wall? | it is a tough rigid outer layer that supports and protects the plant cell it also gives it shape
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| what is the choroplast? | it is a part of a plant cell. it traps the sun's energy and changes into chemical energy in the form of food
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| what are golgi bodies? | they look like flattend pancakes. they usually are not attached to the nucleus. the golgi bodies put protiens (that comes from the ER)into a membrane covered packages called vesicles
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| what are vesicles? | they carry protien and water in, out, and around the cell. they are smaller than vacuoles and function like the mail sevice
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| what are vacuoles? | they are a tempory conpartments that store water(especialy in plants)or waste. vacuoles are larger in plant cells than animal cells
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| how many red blood cells can fit in a leter "o"? | 4,000,000 red blood cells
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| a dot is as big as how many cells? | 500 cells
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| what is a cell you can see without a microscope? | a egg
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| what cell is never replaced? | a nerve cell (neuron)
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| how long would a piece of DNA be if it was 5mm wide? | it would be 2500km long
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| what does "membrane" mean? | thin skin
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| what are the two kinds of cells? | eukaryotes and prokaryotes cells
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| what is the cell membrane sometimes called? | the "gatekeeper"
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| what can you compare a cell to? | a school
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| what are the four groups that all cells are classifyed into? | free-living plant cells, free-living animal cells, associated plant cells, and associated animal cells
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| what part of a plant cell is usually bigger than in a animal cell and why? | the vacuoles because it has more water
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| what is diffusion? | the movement of particals from a area of high constracen to a area of low constrashen.
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| what is osmosis? | the movment of water particals from a area of high constracen to area of loww consrashen.
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