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Biology Chp2.3 - Transport Across Cell Membrane > Cell Membrane > Flashcards

Cell Membrane Flashcards

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1
Q

What is the distance of a cell membrane?

A

7nm -10nm

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2
Q

How permable is the cell membrane?

A

Partially

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3
Q

What type of bilayer does the celll membrane have?

A

Phosopholipids

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4
Q

What is phospholipid made of? - 2 points

A
  • phosphate
  • lipids
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5
Q

What is the name of the cell membrane model?

A

Fluid mosaic

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6
Q

Why is it called the fluid mosaic model? - 2 points

A
  • fluid = the phospholipids are fluid and move around
  • mosaic = the pattern produced by the scatterede protein molecules
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7
Q

What are the heads of a phospholipid?

A

hydrophillic

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8
Q

What are the tails of a phospholipid?

A

Hydrophobic

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9
Q

What are extrensic proteins?

A

proteins which are partially embedded in the bilayer

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10
Q

What are intrinsic proteins?

A

proteins which completely span the bilayer

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11
Q

Why are there proteins in the phosopholipid bilayer?

A

they are used in facilitated diffusion

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12
Q

What are the two ways can be embedded in the bilayer? - 2 points

A
  • partially - extrensic
  • fully span - intrensic
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13
Q

What are the two types of diffusion in the cell membrane? - 2 points

A
  • simple diffuison
  • facilitated diffusion
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14
Q

What type of molecules/substances require simple diffusion? - 2 points

A

small and nono-polar molecules/substances

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15
Q

What type of substances/molecules require facilitated diffusion? - 2 points

A
  • large
  • poar
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16
Q

What are the different proteins used in facilatated diffusion? - 2 points

A
  • carrier protein
  • channel protein
17
Q

Which protein is used for polar molecules/substances? COMPLETE

A
18
Q

Which proteins are used for polar subsyances/molecules? COMPLETE

A
19
Q

What is simple diffusion?

A

the movement of small, non polar molecules down a concentration gradient

20
Q

What is facilitated diffusion?

A

movement of large, polar molecules down a concentration gradient via protein

Biology Chp2.3 - Transport Across Cell Membrane (2 decks)

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