Cellular Traffic Flashcards
What is Diffusion?
-Movement from high to low
-passive, no energy
-continues till equal number of particles on either side of the membrane
What is Facilitated Diffusion?
-substances such as ions, amino acids, simple sugars are helped by carrier molecules
-passive, no energy
What is Osmosis?
-Water
-Diffusion involving water passing through the membrane
-High to low
-Passive, no energy
What is Active Transport?
-Requires carrier protein and energy
-Requires ATP to move materials across the concentration gradient
What is Endocytosis? (two parts)
-Inward movement of particles
-Involves vesicles and ATP, energy
Phagocytosis - solid material
Pincoytosis - droplets of liquids
What is Exocytosis?
-outward movement of particles
-material is packaged in vesicles
- uses ATP, energy
Passive =
-no energy
-high to low
Active =
- Yes energy
- Low to high
Hypotonic
-High water outside cell
-flows in and bursts cell
Hypertonic
- Low water outside cell
- Cell shrivels up
Isotonic
- No change
- Equal in and outside cell
What types of cellular traffic require energy?
Active transport, endocytosis, exocytosis
What types of cellular traffic do NOT require energy?
Osmosis, Diffusion, Facilitated Diffusion
