Module 2

Question 1

What are the two body fluid compartments?

Answer 1

Extracellular fluid and Intracellular fluid

Question 2

What are the four functions of cell membranes?

Answer 2

Physical isolation between ICF and ECF
Regulation of exchange with the environment
Communication between cell and environment
Structural support through cell - cell connections

Question 3

What are the main building blocks of cell membranes and why does the composition amount change?

Answer 3

Protein, Lipid and Carbohydrates
The composition changes based of function with more metabolically active cells having more proteins

Question 4

What are the three main types of lipids found in cell membranes?

Answer 4

Phospholipid - the main lipid of cell membranes
Sphingolipid - longer than phospholipid to make elevated areas
Cholesterol - increases viscosity and decreases permeability. Provides stability to membrane

Question 5

What are the two types of proteins in cell membranes

Answer 5

Integral proteins - lipid anchored and Trans-membrane

Peripheral proteins - attached to integral proteins or phospholipid heads

Question 6

What is a caveolae?

Answer 6

A depression / indentation within the Cellular membrane

Question 7

What are the two types of Cell membrane Carbohydrates?

Answer 7

Glycoprotein - attached to a protein. Protective coat & Recognition

Glycolipid - attached to a lipid. cell to cell recognition