How Do the Epithelial Tissues Covering Organisms Contribute to the Maintenance

Multiple Choice

How do the epithelial tissues covering organisms contribute to the maintenance of homeostasis?

A) They act as a barrier to create an internal environment different from the external environment.
B) They regulate the exchange of ions between the body and the environment.
C) They help to prevent water loss from the body in a terrestrial environment.
D) All of the above answers apply.
E) Only A and C apply.