Ok, so I just started learning about the structure and composition of cell’s membrane and there is one little detail that I fail to understand.
So, the membrane is composed of a phospholipid bilayer. The phospholipid has a polar, hydrophilic head and a nonpolar, hydrophobic tail. Ok, now my question: Why doesn’t the hydrophilic head dissolve in the extracellular fluid outside the cell? I mean, I suppose that the extracellular fluid is watery, so how come that the water-loving head doesn’t interact with the water from the extracellular fluid?
I am sorry if the question is retarded, but I have been wondering about this for some days. :)) Please someone enlighten me.
Hydrophilic is chemical concepts, which means its ability to the formation of hydrogen bonds. It dose not simply mean to dissolve in the water. Some metal is also Hydrophilic, but the metal does not dissolve in the water.