Bio Cell Membrane Quiz

Cell Membrane

boundary between inside the cell and outside the cell

selectively permeable:

Only lets certain things in and out

What does the cell membrane do?

It identifies and communicates with other cells. It also s used to recognize and attack foreign cells

Fluid Mosaic Model

How scientist decide how the cell membrane functions and what it looks like

Phospholipid Bilayer

What the cell membrane is composed of

Phosphate group/head

Polar

Fatty Acid/tail

Non polar

Glycerol

Connected to the head and tail

5 types of proteins are:

1. Cholesterol

2. Marker Protiens/Glycoprotiens

3. Receptor Protiens

4. Transport/Channel Protiens

5. Enzymes

What does cholesterol do?

Stabilizes Phosopholipds tails in hot and cold environments and keeps it from becoming too hard or soft

What do receptor proteins do?

Recognizes and binds to substances on extracellular side

What do transport protiens do?

Helps substances go in and out of cell and prevents substances from contacting phosolipids

What do enzymes do?

Helps with chemical reactions in/out side f the cell

Integral

Go all the way through the membrane

Peripheral

Sits on the inside or outside of the cell

What is a organelle without a membrane?

Ribosomes