With reference to a normal human being, which one of the following statements is not correct?
Human saliva is approximately neutral.
An adult human may secrete 1 to 1.5 litres of saliva per day.
Saliva is secreted by six pairs of salivary glands in human beings.
The salivary enzyme (ptyalin) breaks down cooked starch into maltose.
A
Human saliva is approximately neutral.
B
Saliva is secreted by six pairs of salivary glands in human beings.
C
An adult human may secrete 1 to 1.5 litres of saliva per day.
D
The salivary enzyme (ptyalin) breaks down cooked starch into maltose.
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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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