Introduction
Selective permeability is a function and a feature of the cell membrane, which is crucial to regulate homeostasis. According to Turksen (132), the plasma membrane function by controlling specific passing of some substances and at the same time hinders entry of some substances into the cell. As high school students, we were curious of a cell membrane could do this function. We, therefore, performed an experiment to test how a chicken eggshell membrane could allow some substances to pass through it while hinders the passage of some substances. We dissolved the eggshell in vinegar. After a thorough reading, the book by Turksen (143), we ...
