Question

1. the gi tract is lined with:

enzymes
bile
mucosa
phlegm

1. there are ______ pairs of salivary glands.

2
3
4
5

Explanation:

For question 3, the gastrointestinal (GI) tract is lined with mucosa which serves protective and absorptive - secretory functions. Enzymes are substances involved in digestion, bile is produced by the liver and aids in fat digestion, and phlegm is related to the respiratory tract. For question 4, there are 3 pairs of major salivary glands: parotid, sub - mandibular, and sub - lingual.

Answer:

1. Mucosa
2. 3