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stuff on cells
cells and stuff
| Question | Answer |
|---|---|
| what are some things that make something living? | it reprodues, reacts, it grows, and it moves |
| are trees living? | yes |
| robots are living? | no |
| what is a eukaryoyic cell? | a plant or animal cell that has a membrane around the nucleus and their organelles |
| what are prokaryotic cells? | they are cells that have no membrane around their DNA |
| 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 |
| 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 |
| what is the cytoplasm? | a jelly like substance that contains organelles, water, and life suporting materials |
| what is the nucleus? | it is the most inportant organelle because it contains the DNA. it also controls all activities in the cell |
| metabolism is... | the total of all chemical reactions that take inside of a cell |
| ribosomes are... | a very tiny structres attached to the endoplasmic reticulum (ER), and their function is to asemble protiens |
| what is the ER? | a network of conected chanells that look like folds in a acordien. it stores and delivers protiens in a cell |
| 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 |
| what is the cell wall? | it is a tough rigid outer layer that supports and protects the plant cell it also gives it shape |
| 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 |
| 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 |
| 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 |
| 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 |
| how many red blood cells can fit in a leter "o"? | 4,000,000 red blood cells |
| a dot is as big as how many cells? | 500 cells |
| what is a cell you can see without a microscope? | a egg |
| what cell is never replaced? | a nerve cell (neuron) |
| how long would a piece of DNA be if it was 5mm wide? | it would be 2500km long |
| what does "membrane" mean? | thin skin |
| what are the two kinds of cells? | eukaryotes and prokaryotes cells |
| what is the cell membrane sometimes called? | the "gatekeeper" |
| what can you compare a cell to? | a school |
| 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 |
| what part of a plant cell is usually bigger than in a animal cell and why? | the vacuoles because it has more water |
| what is diffusion? | the movement of particals from a area of high constracen to a area of low constrashen. |
| what is osmosis? | the movment of water particals from a area of high constracen to area of loww consrashen. |
Created by:
maxdabbs
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