2379226
Description
Flashcards by Charlotte Hewson, updated more than 1 year ago
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Created by Charlotte Hewson
about 9 years ago
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| Question | Answer |
| what are similar cells grouped together to form? | tissues |
| what are tissues grouped together to form? | organs |
| what are organs combined to form? | systems |
| what is cell differentiation? | each cell becomes specialised in structure to suit its function |
| how does a cell differentiate? | every cell contains the genes needed for it to develop into any one kind, but only a few of these genes are turned on, the rest are switched off. |
| what is the term for when a gene is switched on? | expressed |
| along with the shape of a cell, what does differentiation also vary? | the number of each organelles |
| give an example of two cells containing different numbers of organelles | sperm cell = lots of mitochondria bone cell = very few mitochondria |
| what is a tissue? | a collection of similar cells that perform a specific function |
| what are two examples of tissues? | - epithelial tissues -xylem |
| what is an organ made up off? | a combination of tissues that perform different functions |
| which blood vessels are considered organs? | veins and arteries |
| which blood vessel is not considered an organ? | capillaries |
| what are three systems? | -digestive system -respiratory system -circulatory system |
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