Which of the following are functions of mucus in the body? 1. Lubrication 2. Improvement of gas exchange 3. Waterproofing 4. Protection from inflammation

a. 1 and 3 only
b. 1 and 4 only
c. 1, 3, and 4 only
d. 1, 2, 3, and 4


ANS: C

Health Professions

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