Reference no: EM133073750
Worms
1) What causes Schistosomiasis?
2) How many people are infected with Schistosoma? _____________________
3) How does fresh water become contaminated by Schistosoma eggs?
4) Why are snails important in spreading the disease? ____________________
5) What are the symptoms of Schistosomiasis? _________________________
6) What four parts of the body can be damaged by repeated infections over many years? ______________
7) How long should you wait after your last exposure before a blood sample is taken? _____________________________
8) List three parts of the world where Schistosomiasis occurs:
9) Why do you think that swimming in chlorinated pools is "generally thought to be safe"? _______________
10) How long should you boil water to make it safe to drink?
11) Why is water that has been stored for 48 hours safe for showering?
12) Give examples of industrial activities that contaminated soil.
13) Which metals are in these soils? ___________________________________
14) Why was the "Diamond Light Source" important in the study:
15). Explain how earthworms can help in removing toxins from the soil.
16). What problem was caused by the popularity of medicinal leeches?
17). In the past, how many leeches were used on a patient at the same time?
18). Explain why leeches are now used around skin flaps and grafts.
19). Which anticoagulant do leeches introduce into a bite? __________________
20). What problem do surgeons have in South Africa?
21). What is the natural host of Aliolimnatis buntonenevis? _________________
22). What are two problems with using these leeches, and how could they be solved?
23) Where in the human body do the worms live? _______________________
24) Which parts of the world have lymphatic filariasis?
25) How long does the adult worm live? ________________________________
26) Why do tourists have a very low risk?____________
27) What are the main symptoms of the disease?
28) What does the treatment do? ___________________________________
29) What is ulcerative colitis caused by? ______________________________
30) What are the symptoms? ________________________________________
31) What evidence is there that allergies may be caused by a lack of worms?
32) Roughly what percentage of people now suffer from some sort of allergy? ___________ %
33) Where do hookworms "hang around"? ______________________________
34) What does a hookworm drink? ___________________
35) What is the main way people get infected with toxoplasma parasite?_______
36) What effect does toxoplasma have on rats? __________________________
37) What effect does toxoplasma have on people? ________________________
38) What worms were used in this study? _______________________________
39) Explain the theory of "oxidative stress".
40) Give two reasons why these tiny worms are a "useful tool" to scientists.
41) What experiment was done using the worms, and what was the result? ____________
42) According to Dr Gems, what is important for reducing the risk of many "old age" diseases?
43) Do you agree with the statements by Pamela Mason? Explain why.
Attachment:- worms.rar