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biology review

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
Receptor molecule   Proteins on the surface of the cell membrane that receive signals from the nervous and endocrine system. These are needed for your cells to communicate and work together.  
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Neuron   A nerve cell.  
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Lipids   Store energy and include fats, oils and waxes. They are made from fatty acids and glycerol.  
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Jobs of proteins   Make enzymes, Make receptor molecules, Make antibodies, Make hormones.  
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Lock and key model   One type of enzyme fits one type of molecule. Change its shape and the enzyme will no longer work.  
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Digestive system   Food is broken down so that it is small enough to enter the body tissues/cells.  
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Immune system   The job of the immune system is to protect the body against pathogens.  
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types of pathogens   Viruses, bacteria, and parasites.  
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Excretory system   Removes metabolic waste from your body.  
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Nervous system   Regulates your body along with the endocrine system.  
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