Question

With reference to a normal human being, which one of the following statements is not correct?

A
Human saliva is approximately neutral.
B
An adult human may secrete 1 to 1.5 litres of saliva per day.
C
Saliva is secreted by six pairs of salivary glands in human beings.
D
The salivary enzyme (ptyalin) breaks down cooked starch into maltose.
Solution
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  • Salivary glands open into the buccal cavity.
  • There are 3 pairs of salivary glands, viz., sublingual glands below the tongue, submandibular gland below lower jaw andparotid gland in front of the ear.
  • The salivary glands have two types of cells namely serous and mucous.
  • Serous produce a digestive enzyme salivary amylase or ptyalin. Mucous cells produce mucous.
  • Thus, the correct answer is option C.

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