Cellular Traffic

Question 1

What is Diffusion?

Answer 1

-Movement from high to low
-passive, no energy
-continues till equal number of particles on either side of the membrane

Question 2

What is Facilitated Diffusion?

Answer 2

-substances such as ions, amino acids, simple sugars are helped by carrier molecules
-passive, no energy

Question 3

What is Osmosis?

Answer 3

-Water
-Diffusion involving water passing through the membrane
-High to low
-Passive, no energy

Question 4

What is Active Transport?

Answer 4

-Requires carrier protein and energy

-Requires ATP to move materials across the concentration gradient

Question 5

What is Endocytosis? (two parts)

Answer 5

-Inward movement of particles
-Involves vesicles and ATP, energy

Phagocytosis - solid material
Pincoytosis - droplets of liquids

Question 6

What is Exocytosis?

Answer 6

-outward movement of particles
-material is packaged in vesicles
- uses ATP, energy

Question 7

Passive =

Answer 7

-no energy
-high to low

Question 8

Active =

Answer 8

• Yes energy
• Low to high

Question 9

Hypotonic

Answer 9

-High water outside cell
-flows in and bursts cell

Question 10

Hypertonic

Answer 10

• Low water outside cell
• Cell shrivels up

Question 11

Isotonic

Answer 11

• No change
• Equal in and outside cell

Question 12

What types of cellular traffic require energy?

Answer 12

Active transport, endocytosis, exocytosis

Question 13

What types of cellular traffic do NOT require energy?

Answer 13

Osmosis, Diffusion, Facilitated Diffusion