Q1 of 33 Page 92

Give reasons for: (AS 1)

While cutting onions our tears start flowing.

While cutting onions our tears start flowing because onions stimulate the lachrymal glands of the eyes by producing a chemical irritant/ gas known as Syn-Propanethial-S-oxide. This chemical irritant stimulates the lachrymal glands and thus our tears start to flow.


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1

Give reasons for: (AS 1)

Removal of wax layer too often will raise incidence of ear infection

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Give reasons for: (AS 1)

During severe cough and cold we lose taste of food.

 2

Find out the false statements and rewrite them as correct ones. (AS 1)

The rationale behind seeing is just the impression of the image in the retina.

 2

Find out the false statements and rewrite them as correct ones. (AS 1)

Ear functions only to hear.