Unit Four - Cells - Cell Membrane

Question 1

Function of the Cell Membrane (2)

Answer 1

1. Regulates what enters & leaves cell
2. Maintain Homeostasis

Question 2

Structure of the Cell Membrane (3)

Answer 2

1. Two “Fluid” Layers of Phospholipids
2. Embedded Proteins
3. Receptor/Marker Proteins on Surface

Question 3

Structure of the Phospholipid (3)

Answer 3

1. Phosphate Head (Hydrophilic)
2. Fatty Acid Tails (Hydrophobic)
3. Glycerol connect the head & tail

Question 4

What is a Transmembrane Protein? (2)

Answer 4

1. Extends thru lipid bilayer
2. Forms channel/pumps for transport

Question 5

What are the receptors in the cell membrane? (5)

Definition, 2 Examples, Characteristic & Connection

Answer 5

1. Carbs that attach the proteins and lipids
2. Glycoprotein - Attach to Protein
3. Glycolipid - Attach to Lipid
4. Short Polysaccharide
5. ID Tag

Question 6

What type of permeability is the cell membrane?

Answer 6

Semi - Permeable