In the plasma membrane, the phospholipid heads
◦ are hydrophilic and face outward toward the aqueous solution on both sides of the membrane.
◦ are hydrophilic and face inward, shielded from water.
◦ are hydrophobic and face inward, shielded from water.
◦ are hydrophobic and face outward toward the aqueous solution on both sides of the membrane.