Cell membrane discussion

Daily Questions - November 6th
The cell membrane is made up of a bilayer made of two parts

1. Polar Phoshpate heads which are attracted to water (Hydrophilic)

2.  NonPolar Fatty Acid (lipid) Tails which are repelled by water (Hydrophobic)

Because of this, what kind of molecules can pass freely through the cell membrane? Small nonpolar molecules such as oxygen, carbon dioxide and nitrogen gasses.

Other substances (larger/polar molecules) move through membrane proteins known as  Transport Proteins (Channel and carrier proteins)

After the daily questions we went through the notes and followed along with the following diagram, adding these specific notes to it.

After going through the notes specifically on phospholipids, I had you watch the first couple minutes of the the following video relating the bilayer to Musk Ox.

Understanding how the cell membrane is 3 Dimensional can sometimes be very difficult.  I used the analogy of a wiffle ball.  I used just a basic pingpong ball as a visual for you to help you see that this is ALL around the cell - we are just looking at a cross section of it.

This of the cell as this pingpong ball - The cell membrane would be the plastic all around it

If we cut the the cell in half we would be looking at the inside
of the cell (where all the organelles and cytoplasm are)

Any of the images we are looking at of the cell membrane would be like
looking JUST at the plastic part that I colored black on here.