Unit 5 quiz review Flashcards
1
Q
Def of Diffusion:
A
- molecules directly cross the membrane
- moves from high to low concentration
- moves small/nonpolar molecules
2
Q
Facilitated Diffusion:
A
- moves from high to low concentration
- through a protein channel
- moves large/polar/charged molecules
3
Q
Passive transportation includes:
A
Diffusion and facilitated diffusion (from high to low)
4
Q
Active transportation includes:
A
Active transport and bulk transport (from low to high)(uses energy)
5
Q
Active transport:
A
- movement from low to high concentration
- protein pumps
6
Q
Bulk transportation/flow:
A
- moving VERY large molecules
7
Q
Exocytosis:
A
in bulk transportation when large molecule is going OUT
8
Q
Endocytosis:
A
in bulk transportation when large molecule is going IN
9
Q
Components of a cell membrane (8):
A
- Phospholipid bilayer
- Phospholipid head (hydrophilic)
- Phospholipid tail (hydrophobic)
- Glycoprotein (has lump with string)
- Glycolipids (only has string)
- Transmembrane protein (long block)
- Peripheral protein (small block)
- Cholesterol (string inside tail)
10
Q
Hypotonic environment def. :
A
- More water
- less solute
- swells/lyse
11
Q
Hypertonic environment def. :
A
- Less water
- more solute
- shrivels
12
Q
Isotonic solution:
A
- the same amount of water and solute
- keeps equilibrium (no net movement)
13
Q
Osmosis def:
A
- the diffusion of water molecules
14
Q
Difference plant cells with cell wall:
A
- in hypertonic environment, cell wall stays put but the insides shrink in, this is Plasmolysis
- in hypotonic environment, cell wall can’t lyse so it becomes turgid and more firm
