allows substances to cross easily than others
both a hydrophilic region andydrophobic
fluid mosaic model
the membrane is a mosaic of protein molecules bobbing in a fluid bilayer of phospholipids
polar heads-glycerol and phosphate
fatty acid tails- fatty acid chains
water through a membrane
solute particles through a membrane
what does cholesterol do?
Cholesterol helps to stabilize the structure of the plasma membrane
what do phospholipids look like?
Phospholipids can be recognized by the presence of a head and two tails
is composed of both a carbohydrate and a protein.
Cell membranes are asymmetrical. Which of the following statements is the most likely explanation for the membranes asymmetrical nature?
A)Since the cell membrane forms a border between one cell and another in tightly packed tissues such as epithelium, the membrane must be a asymmetrical
B) Since cell membranes communicate signals from one organism to another, the cell membranes must be asymmetrical
C) The two sides of a cell membrane face different environments and carry out different functions.
D) Proteins only function on the cytoplasmic side of the cell membrane, which results in the membranes asymmetrical nature.