The Cell Membrane Flashcards
1
Q
The cell membrane (CM) is _________ permeable
A
The cell membrane is SELECTIVELY permeable (coffee filter)
2
Q
_____ cells have a cell membrane (CM)
A
ALL cells have a cell membrane
3
Q
substances ________ will travel through the cell
A
substances SMALLER THAN SUGAR will travel through the cell
4
Q
examples of substances that will travel through the cell
A
calcium,
sodium,
suger,
water, etc
5
Q
THE FLUID MOSIC MODEL is used to ___________
A
THE FLUID MOSIC MODEL is used to DESCRIBE the CM
6
Q
What is the first “layer” of TCM?
A
The phosphoLIPID bi-layer
7
Q
describe the first “ayer” of TCM
A
- double layer (bi)
- phosphate ends face toward the water
- phosphate ends are hydrophilic
- fatty tails (lipid) face inwards
- lipids are hydrophobic
- cholesterol
8
Q
what is the second “layer” of TCM?
A
protein channels
9
Q
describe the second “layer” of TCM
A
- found throughout the bilayer
- may pass all the way through the cell
- may only be attached to the inside or outside
