The primary functions of epithelium include:
A. | To protect the tissues that lie beneath from radiation, desiccation, toxins, invasion by pathogens, and physical trauma |
B. | The regulation and exchange of chemicals between the underlying tissues and a body cavity |
C. | The secretion of hormones into the circulatory system, as well as the secretion of sweat, mucus, enzymes, and other products that are delivered by ducts |
D. | To provide sensation |
E. | Absorb water and digested food in the lining of digestive canal. |
1. All except D | 2. All except C and D |
3. All except C | 4. All |