Cellular Traffic Flashcards

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1
Q

What is Diffusion?

A

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

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2
Q

What is Facilitated Diffusion?

A

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

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3
Q

What is Osmosis?

A

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

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4
Q

What is Active Transport?

A

-Requires carrier protein and energy

-Requires ATP to move materials across the concentration gradient

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5
Q

What is Endocytosis? (two parts)

A

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

Phagocytosis - solid material
Pincoytosis - droplets of liquids

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6
Q

What is Exocytosis?

A

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

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7
Q

Passive =

A

-no energy
-high to low

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8
Q

Active =

A
  • Yes energy
  • Low to high
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9
Q

Hypotonic

A

-High water outside cell
-flows in and bursts cell

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10
Q

Hypertonic

A
  • Low water outside cell
  • Cell shrivels up
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11
Q

Isotonic

A
  • No change
  • Equal in and outside cell
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12
Q

What types of cellular traffic require energy?

A

Active transport, endocytosis, exocytosis

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13
Q

What types of cellular traffic do NOT require energy?

A

Osmosis, Diffusion, Facilitated Diffusion

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