The lipids that compose the cell membrane are arranged with "heads" and "tails" such that:
A)The "heads" are in contact with extracellular and intracellular fluid and the "tails" oriented away from these fluids
B)The "tails" are in contact with extracellular and intracellular fluid and the "heads" oriented away from these fluids
C)Half of all "heads" and "tails" are in contact with extracellular fluid
D)Both "heads" and "tails" are in contact with intracellular fluid

Question

Quizplus · Accepted Answer

The "heads" of the lipids in the cell membrane are hydrophilic (water-loving) and interact with the aqueous environment of the extracellular and intracellular fluids. The "tails" of the lipids are hydrophobic (water-fearing) and orient away from the fluids, creating a nonpolar, hydrophobic interior of the membrane. This arrangement is called a phospholipid bilayer, where the hydrophilic heads face outward and the hydrophobic tails face inward.

The Lipids That Compose the Cell Membrane Are Arranged with "Heads