Created by lily bevan
almost 7 years ago
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Question | Answer |
What are the 3 types of defences out bodies have against pathogens? | Physical, chemic, & bacterial. |
What are some examples of physical defences & how do they help? | Examples: The skin; mucus in the respiratory & digestive systems: platelets in blood. They help by preventing pathogens from invading our tissues |
What are some examples of chemical defences & how do they help? | Examples: Stomach acid; enzymes & substances that kill microbes in salvia, mucus, & tears. They destroy pathogens & stop them producing. |
What are some examples of bacterial defences & how do they help? | Examples: The skin; mucus in the respiratory & digestive systems; platelets in the blood. They prevent pathogens from invading our tissues. |
What are some examples of chemical defences & how do they help? | Examples: stomach acid; enzymes & substances that kill microbes in saliva, mucus, & tears. They destroy pathogens & stop them from reproducing. |
What are some examples of bacterial defences & how do they help? | Examples: Helpful bacteria that live on the skin & in the gut. They compete against pathogens by using up nutrients & space. |
What is a non-specific defence? | A defence that is always present. They are not made in response to a specific pathogen. |
What are platelets? | they are fragments of cells made from cytoplasm of large cells. |
What do platelets do when a blood vessel is damaged? | They stick to the cut edge & send out substances that trigger a series of reactions, creating a blood lot @ the site. |
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