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Cell Functions

Galbraith Science 8

Answer
What is the function of the cell membrane? It controls the entry and exit of materials in the cell
What is the ribosome? The site where proteins are produced
What is the endoplasmic reticulum? A network of channels that move materials through the cell
What is the nucleus? The control cenre of the cell
What is cytoplasm? A jelly-like substance that fills the inside of a cell.
What is the function of the vacuole? It stores water, nutrients and wastes in the cell
What are mitochondria? The site of cellular respiration (uses food and oxygen to make energy, caarbon dioxide and water).
What is chloroplast? The site of photosynthesis (uses sunlight, water and carbon dioxide to produce food and oxygen).
What is the function of the golgi body? To sort proteins and packs them into vesicles
What is osmosis? Water particles that diffuse througha selectively permeable membrane. They move from an area of higher concentration to lower concentration.
What are bacteria? Single celled micro-organisms that can be harmful (by causing disease) or helpful (in digestion).
What is concentration? The amount of a substance in a given space.
Where do cells make their energy? In the mitochondria.
What is an example of a prokaryotric cell? Bacteria. They are smaller than eukaryotic cells.
What is an example of a eukaryotic cell? Plant and animal cells. They are bigger than prokaryotic cells.
What is the function of the cell wall? It provides protection and support to plant cells.
What is the function of lysosomes? They clean the cell (recycle)
What is cellular respiration? Cells make energy by using glucose and oxygen and producing water and energy.
What is equilibrium? When there is an equal number of particles on both sides of a membrane. (The particles still move back and forth)
Whta is diffusion? The movement of particles from an area of higher concentration to an area of lower concentration.
What is a virus? Tiny non-living particles that can only reporduce when they enter a host cell. There is no nucleus or organelles.
List 5 characteristics of living things. 1) they respond to their environment 2) they need energy 3) they grow 4) they reproduce 5 they get rid of wastes
What are the 3 parts of cell theory? 1) the cell is the basic unit of life 2) all organisms are composed of one or moe cells 3) all cells "come from" all living things
What happens to a plant if chloroplasts stop working? It can't make food and it will die
What is a selectively permeable membrane? A barrier that allows some materials to pass through but keeps others out. (eg a coffee filter or a cell membrane)
What is an organelle? All the parts inside a cell that carry out functions for survival.
What is photosynthesis? A chemical reaction in plants. It happens in the chloroplast where energy from the sun combines with water and carbon dioxide to produce sugar and oxygen.
 

 



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