Higher Human 3.5 Word Scramble
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| Question | Answer |
| What kind of cells form a physical barrier? | Epithelial cells |
| Where are closely packed epithelial cells found? | the skin and inner linings of the digestive and respiratory systems. |
| What kind of secretions are produced against pathogens? | Secretions include tears, saliva, mucus and stomach acid. |
| What is a pathogen? | A pathogen is a bacterium, virus or other organism that can cause disease. |
| What is the name given to the response when histamine is produced? | The Inflammatory Response. |
| What releases histamine? | mast cells |
| What does histamine do? | causes vasodilation and increased capillary permeability. |
| During the inflammatory response the increased blood flow leads to ? | an accumulation of phagocytes and clotting elements at the site of infection. |
| What do phagocytes do? | Phagocytes recognise pathogens and destroy them by phagocytosis. |
| What is phagocytosis? | Phagocytosis involves the engulfing of pathogens and their destruction by digestive enzymes contained in lysosomes. |
| What releases cytokines? | Phagocytes release cytokines |
| What are cytokines? | Cytokines are protein molecules that act as a signal to specific white blood cells causing them to accumulate at the site of infection. |
| What do cytokines attract? | attract more phagocytes to the site of infection |
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