Chapter 6: Lipids & Membranes

Question 1

What is Diffusion?

Answer 1

A net movement of substances from regions of high concentration to regions of low concentration

Question 2

What is a Solute?
A. Random motion but no net movement
B. The difference in soulute concentrations
C.The dissoved molecules and ions

Answer 2

C. The dissolved molecules and ions

Question 3

What is the Concentration Gradient?
A. Random motion but no net movement
B. The difference in soulute concentrations
C.The dissoved molecules and ions

Answer 3

B. The difference in solute concentrations

Question 4

What is the Equalibrium?
A. Random motion but no net movement
B. The difference in soulute concentrations
C.The dissoved molecules and ions

Answer 4

A. Random motion but no net movement (random distrubution)

Question 5

What are the THREE forms of Passive Transport?

Answer 5

• Diffusion (movement from a high concentration of particles to a low concentration)

-Facilitated Diffusion (Movement through carrier or channel protiens from high to low)

-Osmosis (movement of WATER from a high solute to a low solute)

Question 6

What are the two types of protens used through facilitated diffusion? Describe the differences.

Answer 6

Carrier-mediated protiens bind to specific substrates

Channel-mediated protiens do NOT bind to subtrates and is considered a walk way for subtrates to pass through

Question 7

What are the two defining characteristics of Passive Transport?

Answer 7

NO ENERGY
A net movement towards concetration gradient

Question 8

What are the two defining characteristics of Active Transport?

Answer 8

ENERGY IS NEEDED
A net movement against the concentration gradient

Question 9

What are Pumps?

Answer 9

Membranes or ions that provide active transport

Question 10

What are the THREE types of Active Transport? Describe each process.

Answer 10

Primary Active (uses energy directly)

Cotransport (Occurs when gradient set up by a pump provides the potential energy required to power against its particular gradient)

Bulk Transport (the movement of larges molecules through verscles transport; Endocytosis & Exocytosis)

Question 11

What are the TWO types of Bulk Transport? Describe the process

Answer 11

Endocytosis (uptake of material into cells by inclusiion within invagination of the plasma membrane; Phagocytosis, Pinocytosis, and Recepter mediated)

Exocytosis (Discharge of material from vesicles at the cell surface)

Question 12

Describe Phagocytosis

Answer 12

The process of bulk transport that is material taken in a particulate (solid) form

Question 13

Describe Pinocytosis

Answer 13

The process of bulk transport that is material in as a liquid form