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  1. What is a common name for the substance which irritates lachrymal glands ?

  2. A.

     Tear Gas

    B.

     Laughing Gas

    C.

     Anaesthetic Gas

    D.

     Noble Gas

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    Answer : Option A

    Explanation :

    Lacrimal gland, located under the upper eyelid at the outer cornea of the eye, is responsible for tearing during emotional stimulation or following corneal irritation by a foreign body or chemical substance. Tear gas, also called lacrimator, refers to any of a group of substances that irritate the mucous membranes of the eyes, causing a stinging sensation and tears. It produces severe lacrimation by irritating the conjunctivae.


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