TOPIC 3- INFECTION AND RESPONSE

Question 1

What are pathogens

Answer 1

microorganisms that enter the body and cause disease , cause communicable diseases that can spread to both plants and animals

Question 2

What are bacteria

Answer 2

bacteria are very small cells which produce toxins to make us feel ill

Question 3

what are viruses

Answer 3

viruses are not cells they reproduce rapidly and the cell damage make us feel ill

Question 4

what are protists

Answer 4

parasites live on or inside other organisms and can cause them damage .

Question 5

Name three viral diseases

Answer 5

measles is a viral disease spread by droplets develops a red rash and is treated with a vaccinated

HIV is a virus caused by sexual contact that damages your immune system

TMV happens in plants , causes discolouration so cannot carry out photosynthesis

Question 6

fungal disease

Answer 6

rose black spot , cause the leaves to turn yellow and cannot carry photosynthesis , can be treated with fungicides

Question 7

disease caused by protists

Answer 7

malaria causes repeating episodes of fevers that can be fatal , the spread can be stopped by stopping the mosquitoes from breeding

Question 8

name two bacterial diseases

Answer 8

salmonella , caused by food poisoning , causes fever diarrhoea caused by toxins from bacteria . prevented from cleaning surfaces

gonorrhoea is a sexually transmitted disease , will cause pain when urinating and is treated with an antibiotic called penicillin

Question 9

how does your immune system attack pathogens .

Answer 9

white blood cells engulf foreign cells , rapidly produce antibodies to find all bacteria and viruses , producing antitoxins to counteract the invading bacteria