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Standard XII
Biology
Salivary Gland and Saliva
Question

Identify the false statement from the following.
  1. There are two pairs of salivary glands in humans.
  2. Human teeth are thecodont.
  3. Oesophagus does not secrete any enzyme.
  4. Gall bladder is absent in horse.

A
Oesophagus does not secrete any enzyme.
B
Gall bladder is absent in horse.
C
Human teeth are thecodont.
D
There are two pairs of salivary glands in humans.
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Solution
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There are three main pairs of salivary glands: the parotid, the submandibular and the sublingual glands.

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In human digestive system, the enzymes pepsin and trypsin are secreted respectively by:
(a) pancreas and liver
(b) stomach and salivary glands
(c) pancreas and gall bladder
(d) stomach and pancreas
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II. In dentition, the thecodont means that teeth are embedded in the socket of jawbones.
III. There are three pairs of salivary glands in human beings, out of them parotid being the smallest slaivary gland is situated beneath the tongue.
IV. Zymogen (inactive form of enzymes) are not the secretions of peptic cells.
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In human digestive system, various enzymes are secreted from various glands which breakdown complex substances into simpler one.

Select the option which does not contain any enzyme.
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