Enamel can act in a sense like a_______________?
Correct answer: A. Semipermeable membrane
- A. Semipermeable membrane
- B. Impermeable membrane
- C. Permeable membrane
- D. Infrapermeable membrane
Explanation
Enamel is not completely impermeable; water and small ions can diffuse through its interprismatic spaces and pores. It therefore behaves like a semipermeable membrane, allowing limited selective passage of substances.
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