Fluid Mosaic Model

Anatomy and Physiology

What are the three ways substances can exit and enter cells?

• Diffusion

• Transport by proteins

• Endo/exocytosis

Cholesterol maintains the ------------ of the phospholipid bilayer at different temperatures

fluidity

Cholesterol serves as a ------- -------- buffer.

temperature stability

Where is Cholesterol found in the cell membrane?

Lipid Bilayer

What is responsible for rejecting organ transplants and and blood transfusions?

Glycolipids and glycoproteins

When are the functions of glycolipids and glycoproteins in embryo?

• sort tissues and cells to form organs

• prevent mother's immune system from destroying it

Glycolipids are phospholipids whose hydrophilic ------ have an attached carbohydrate chain.

head

Glycoproteins are proteins with an attached ---------- --------.

carbohydrate chain

Where are Glycoproteins and Glycolipids found?

Extracellular side of membrane

A protein that catalyzes specific reactions such as making ATP

Enzymatic Protein

A protein that binds to substances to start a response.

Receptor Protein

A protein that recognizes a certain substance as foreign or local and starts a response, e.g. immunity recognition.

Cell Recognition Protein

A protein that allows molecules/ions cross the membrane using facilitated and active transport. This protein can move from high-to-low or low-to-high concentration.

Carrier Protein

Which type of protein allows particular molecules/ions cross the membrane using facilitated transport?

Channel & Carrier Protein

The 5 types of proteins in the membrane:

1. Channel Protein

2. Carrier Protein

3. Cell Recognition Protein

4. Receptor Protein

5. Enzymatic Protein

Integral membrane proteins are ---------. Peripheral membrane proteins are on the ---------

embedded, surface

What are the two structural types of protein?

• Integral Membrane Proteins

• Peripheral Membrane Proteins

Proteins can float free in the --------- or are held in place by --------- ---------.

lipid bilayer, cytoskeleton filaments

The mosaic pattern is from --------- wholly or partly embedded in the membrane.

proteins

Phospholipid heads are --------- and phospholipid tails are --------- . They have a --------- consistency.

hydrophilic, hydrophobic, fluid

The cell membrane is found in all --------- cells and and is the boundary for ---------.

living, cytoplasm

The cell membrane is a gateway for ___ to enter the cell and ___ to leave the cell.

nutrients, waste