Name the cellular barriers which help in fighting diseases. from

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Human Health and Disease

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21. What is the function of lymph nodes ?

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22. Name the technique that promises cure for diseases like hepatitis B.

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23. How does saliva act in body defence ?

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24. Name the cells that produce antibodies.

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25. Name the cellular barriers which help in fighting diseases.

Leucocytes (WBC) such as Polymorphonuclear leucocytes, (PMNL— neutrophils), monocytes and natural killer and macrophages

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26. Define opioids. Give one example

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27. What is the common name of Heroin ? Write its chemical name.

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28. Name the plant from which cocaine is obtained.

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29. List two plants with hallucinogenic properties.

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30. From where the following drugs are obtained ?
(i) Marijuana (ii) Cocaine.

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