Chapter 3 Module 4

Question 1

Plasma membrane

Answer 1

Selectively permeable barrier and gateway between cistoplasm and ECF

Question 2

Membrane transport types

Answer 2

Passive: no ATP
Active: requires ATP
Not carrier mediated: no membrane protein
Carrier mediated: requires membrane protein

Question 3

Passive transport

Answer 3

• no ATP
• Relies on random molecular motion of particles provides energy
• filtration, diffusion, osmosis

Question 4

Filtration

Answer 4

Membrane substances can move through and as they move pressure forces water and small substances to pass through, but large ones cannot

Question 5

Diffusion

Answer 5

Moves down gradient from high concentration to low concentration
- facilitated requires carrier protein, simple does not

Question 6

Osmosis

Answer 6

Diffusion of water across a membrane from high concentration to low concentration to equalize the concentrations

Question 7

Carrier mediated transport

Answer 7

Requires transport protein: specific protein in plasma membrane that carries solute from one side of membrane to other
- specific and bind with only certain ligand. saturate: have a transport maximum

Uniport protein: One solute at a time
Symport: 2 or more solute at a time
Antiport! 2 or more solute in different directions

Question 8

Sodium potassium pump

Answer 8

Brings potassium in and pumps sodium out from cell and requires ATP

• maintains membrane potential in all cells s keeps inside more negative
• hear production as a byproduct of and consumption

Question 9

2 types of carrier mediated transport

Answer 9

Facilitated diffusion: moves south down concentration w out ATP.
Active transport: mores solute up concentrate requires ATP
-Primary: sodium potassium pump, pumps 3 Na out and 2 K in
-Secondary: brings in glucose w a sodium molecule

Question 10

Vesicular transport

Answer 10

Processes that more large particles or multiple particles in vesicles

• Endocystosis: Moves material into all
  1. Phagocytosis: cell eating
  2. pinocytosis: cell drinking
• exocytosis: discharging material from cell.

-Recepter mediated endocytosis: enables cells to take in specific molecules that bind to extrasellular receptors