Step-by-step explanation:
The physical organization and functioning of all biological membranes depend on their constituents: lipids, proteins, and carbohydrates.
Now, the lipids establish the physical integrity of the membrane. In particular, the phospholipid bilayer serves as a lipid lake in which a variety of proteins float.
To know how is phospholipid arranged in the cell membrane, remember that phospholipids have hydrophilic regions and hydrophobic regions:
1. Hydrophilic regions: The phosphorus-containing head of the phospholipid is electrically charged. This head is associated with polar water molecules.
2. Hydrophobic regions: The long, nonpolar fatty acid tails of the phospholipid associate with other nonpolar materials. These tails do not dissolve in water. That is, these tails are not associated with hydrophilic substances.
Then, in the mosaic fluid model of the cell membrane, the phospholipids can coexist with water by forming a bilayer where the fatty acids of the two layers interact with each other and the polar regions are facing the outside aqueous environment.
We can conclude that the correct answer is:
Answer:
The phospholipids are arranged in the cell membrane in the following form:
the fatty acids of the two layers interact with each other and the polar regions are facing the outside aqueous environment.