L6: Membranes - Membrane Selective Permeability, Transport, Diffusion

Question 1

What is the largest contributor to system stability in bilayer formation?

Answer 1

• ENTROPY of water (ex. increase in motional freedom of the water molecules)

Question 2

What is homeostasis?

Answer 2

• Maintaining a constant environment

Question 3

Describe the membrane in terms of permeability.

Answer 3

• The lipid bilayer is a selective barrier
• “semi-permeable”
• “characteristics of what defines life and cells”
• helps maintain homeostasis

Question 4

What are the different types of passive transport?

Answer 4

• Simple diffusion

- Facilitated diffusion w/ the use of a protein transporter

Question 5

What is passive transport?

Answer 5

• Transport along a concentration gradient

- Does not require energy