Multiple choice

Which of the following components of saliva helps in lubricating chewed food?

  1. Water

  2. Mucus

  3. Digestive enzyme

  4. Acids

  5. Gastric juice
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The major components of saliva are water, digestive enzymes and mucus. Mucus is a slimy material that coats many epithelial surfaces, and is secreted into fluids such as saliva. It is composed chiefly of mucins and inorganic salts suspended in water. Mucus is an abundant and important component of saliva giving it virtually unparalleled lubricating properties.

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