HUMAN NUTRITION

Detailed explanation-1: -Phospholipids are able to form cell membranes because the phosphate group head is hydrophilic (water-loving) while the fatty acid tails are hydrophobic (water-hating). They automatically arrange themselves in a certain pattern in water because of these properties, and form cell membranes.

Detailed explanation-2: -3: The phospholipid bilayer of a cell membrane contains embedded protein molecules which allow for selective passage of ions and molecules through the membrane.

Detailed explanation-3: -Water can’t go through the phospholipid bilayer because water is hydrophilic and the tails of the lipids in the bilayer are hydrophobic.

Detailed explanation-4: -Permeability of phospholipid bilayers. Gases, hydrophobic molecules, and small polar uncharged molecules can diffuse through phospholipid bilayers. Larger polar molecules and charged molecules cannot.