Class 12 Biology - Chapter Human Health and Disease NCERT Solutions | From which plant cannabiniods are obtain
From which plant cannabiniods are obtained? Name any two cannabinoids. Which part of the body is effected by consuming these substances?
Cannabinoids are obtained from the inflorescence of the plant Cannabis sativa commonly known as bhang; and Cannabis indica.
Marijuana, hashish, charas, ganja are some cannabinoids which are known as marihuana. These chemicals interact with cannabinoid receptors of the body that are mainly present in the brain. Cardiovascular system of the body gets affected adversely by taking these substances or drugs.In metropolitan cities life style of the human beings is responsible in the lowering of immunity and sensitivity to allergens. More polluted environment such as dust in the surroundings increases the chances of allergic reactions in children. Some symptoms of allergic reaction like sneezing, watery eyes, running nose and difficulty in breathing etc.
More Questions From Class 12 Biology - Chapter Human Health and Disease
- Q:- How does the transmission of each of the following diseases take place?
(a) Amoebiasis
(b) Malaria
(c) Ascariasis
(d) Pneumonia - Q:- Draw a well-labelled diagram of an antibody molecule.
- Q:- What are the various public health measures, which you would suggest as safeguard against infectious diseases?
- Q:- In your view what motivates youngsters to take to alcohol or drugs and how can this be avoided?
- Q:- List the harmful effects caused by alcohol/drug abuse.
- Q:- What is the mechanism by which the AIDS virus causes deficiency of immune system of the infected person?
- Q:- Name the primary and secondary lymphoid organs.
- Q:- Differentiate the following and give examples of each:
(a) Innate and acquired immunity
(b) Active and passive immunity - Q:- How is a cancerous cell different from a normal cell?
- Q:- Discuss with your teacher what does a suitable gene means, in the context of DNA vaccines.
Popular Questions of Class 12 Biology
- Q:- Why is reproduction essential for organisms? Answer
- Q:- Name the parts of an angiosperm flower in which development of male and female gametophyte take place.
- Q:-
Fill in the blanks:
(a) Humans reproduce __________. (asexually/sexually)
(b) Humans are__________. (oviparous/viviparous/ovoviviparous)
(c) Fertilization is __________ in humans. (external/internal)
(d) Male and female gametes are __________. (diploid/haploid)
(e) Zygote is __________. (diploid/haploid)
(f) The process of release of the ovum from a mature follicle is called__________.
(g) Ovulation is induced by a hormone called the __________.
(h) The fusion of male and female gametes is called _____________.
(i) Fertilisation takes place in _____________.
(j) Zygote divides to form _____________which is implanted in uterus.
(k) The structure which provides vascular connection between fetus and uterus is called ____________. - Q:- What do you think is the significance of reproductive health in a society?
- Q:- Mention the advantages of selecting pea plant for experiment by Mendel.
- Q:- Group the following as nitrogenous bases and nucleosides:
Adenine, Cytidine, Thymine, Guanosine, Uracil and Cytosine. - Q:- Explain antibiotic resistance observed in bacteria in light of Darwinian selection theory.
- Q:- Explain in brief the role of animal husbandry in human welfare.
- Q:- Bacteria cannot be seen with the naked eyes, but these can be seen with the help of a microscope. If you have to carry a sample from your home to your biology laboratory to demonstrate the presence of microbes under a microscope, which sample would you carry and why?
- Q:- Can you list 10 recombinant proteins which are used in medical practice? Find out where they are used as therapeutics (use the internet).
Recently Viewed Questions of Class 12 Biology
- Q:- What is vegetative propagation? Give two suitable examples.
- Q:- Using various resources such as your school library or the internet and discussions with your teacher, trace the evolutionary stages of any one animal say horse.
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- Q:- In our society the women are often blamed for giving birth to daughters.
Can you explain why this is not correct? - Q:- With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte.
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- Q:- Which is a better mode of reproduction sexual or asexual? Why?
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