Indiscriminate diagnostic practices using X-rays etc., should be avoided. Give one reason.
X-rays are ionizing radiations that have adverse effects like they increase the chances of cancer by causing mutations.
Why sharing of injection a needle between two individuals is not recommended?
Sharing of injection needles between two individuals is not recommended because it may lead to the transmission of HIV-infection and cause AIDS.
A student on a school trip started sneezing and wheezing soon after reaching the hill station for no explained reasons. But, on return to the plains, the symptoms disappeared. What is such a response called? How does the body produce it?
The response is called allergy. Allergy is an exaggerated response of the immune system to certain antigens (allergens) present in the environment. It is due to production of IgE type antibodies against allergens and the release of chemicals like histamine and serotonin from mast cells.
A team of students are preparing to participate in the interschool sports meet. During a practice session you find some vials with labels of certain cannabinoids.
(a) Will you report to the authorities? Why?
(b) Name of a plant from which such chemicals are obtained.
(c) Write the effect of these chemicals on human body.
(a) Yes, I would report the matter to the authorities because cannabinoids are classified under drugs and drug abuse is illegal.
(b) Cannabinoids can be obtained from a plant called Cannabis sativa.
(c) The cannabinoids bind to cannabinoid receptors present in the brain and affect the cardiovascular system.
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