Plasma Membrane & Cellular Traffic

Question 1

Plasma Membrane

Answer 1

-Also known as cell membrane
-Insoluble boundary of the living cell that maintains the conents of the cell
-regulates movement of substances in and out of the cell.

Question 2

Fluid Mosaic Model

Answer 2

describes the flexibility of the membrane and the proteins, etc. studded within it.

Question 3

Phospholipid molecules

Answer 3

-makes up most of the cell membrane
-provides a barrier between cytoplasm and outside of cell

Question 4

Proteins (Plasma Membrane)

Answer 4

used to move molecules across the membrane
channel proteins
assists the movement of substances that cannot cross through the phospholipid bi layer

Question 5

Phospholipid structure

Answer 5

-phosphate group is hydrophillic/polar
-lipids are hydrophobic/non-polar

Question 6

cholestorol in the membrane

Answer 6

helps maintain the integrity of the membranes

Question 7

glycoprotein

Answer 7

sugar attached to a protein
important in cell recognition and commmunication

Question 8

Semi permable

Answer 8

allows only select molecules to pass the membrane

Question 9

fatty acid tail

Answer 9

-non polar
-hydrophobic
- water hating

Question 10

phosphate head

Answer 10

-polar
-hydrophillic
-water loving

Question 11

intracellular

Answer 11

inside the cell

Question 12

extracellular

Answer 12

outside the cell

Question 13

what substances move across the membrane?

Answer 13

oxygen, water, carbon dioxide

Question 14

bi layer

Answer 14

two layers of phospholipids.

Question 15

transmembrane protein

Answer 15

-type of integral protein
-gateway to allow transport to substances that cant pass through the bilayer

Question 16

what is a peripheral protein

Answer 16

-attached to the exterior of membrane
-acts as receptor to detect and receive information