A) 5.7
B) 6.7
C) 7.7
D) 2.7
Correct Answer: B
Solution :
Saliva is a complex mixture and hypotonic solution that is secreted continuously from the salivary glands under the control of ANS. Daily secretion of saliva is about 1 to 1.5 L and operates at 6.7 pH. Secretion of saliva is a reflex action. Saliva is formed about 95.5% water, 0.2% minerals, and 0.3% organic compounds like mucin and starch splitting enzyme ptyalin (salivary amylase)
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