Multiple choice

Which of the given fluids is a mixture of mucus and serous fluids that have enzymes needed to moisten and lubricate the food during mastication and ingestion?

  1. Bile

  2. Pancreatic juice

  3. Gastric juice

  4. Saliva

  5. Urine

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Saliva is a watery substance secreted by the salivary glands and located in the mouth. Human saliva is composed of 99.5% water while the other 0.5% consists of electrolytes, mucus, glycoproteins, enzymes and antibacterial compounds such as secretory IgA and lysozyme.