Lecture 7- Plasma Membrane and Transport

What model best explains the plasma membrane?

What is the phospholipid bilayer composed of?

Is cholesterol polar?

How does cholesterol attach to phospholipids?

Roles of membrane proteins

What are the functions on the plasma membrane?

What determines the fluidity of the membrane?

What effect does cholesterol have on the first few hydrocarbon groups of the phospholipids?

What is a feature of intracellular membranes?

Why is it necessary for the membrane to be fluid?

What is the purpose of selective permeability of plasma membranes?

What molecules are permeable to the lipid bilayer?

What molecules are impermeable to the lipid bilayer?

Which types of transport across the plasma membrane are passive?

Which types of transport across the plasma membrane are active?

Which types of transport across the plasma membrane are vesicular?

What is diffusion?

What is facilitated diffusion?

What is osmosis?

What are the transmembrane proteins channels that osmosis occurs through called?

What are the two types of pressures present in osmosis called?

What happens to red blood cells if they are placed in a hypertonic solution?

What happens if red blood cells are placed in a isotonic solution?

What happens if red blood cells are placed in a hypotonic solution

How can you relive cerebral edema (water on the brain)?

What is primary active transport?

What is secondary active transport (co-transport)?

Who is given the drug digitalis?

How does digitalis work?

What is vesicular transport used for?

What are the three types of endocytosis?

In which cells is exocytosis important?

What is trancytosis?

What are tight junctions?

What are adherens junctions?

What are desmosomes and hemidesmosomes?

Where are desmosomes and hemidesmosomes usually found?

What are gap junctions?

Where are gap junctions found?