Question

if phospholipids are dropped in water, they can form a ball - shaped structure called a micelle. the model shows the cross section of a micelle formed by phospholipids. the micelle is surrounded by water. explain why phospholipids dropped in water form a micelle. complete the paragraph. the phospholipid face away from the water because they are . the phospholipid face toward the water because they are .

Explanation:

Phospholipids have a hydrophobic (water - fearing) tail and a hydrophilic (water - loving) head. In water, the hydrophobic tails will face away from water as they repel water, and the hydrophilic heads will face towards water as they are attracted to water. So for the first blank (part facing away from water), it's "tails" and the reason is "hydrophobic". For the second part (part facing towards water), it's "heads" and the reason is "hydrophilic".

Answer:

The phospholipid \(\boldsymbol{\text{tails}}\) face away from the water because they are \(\boldsymbol{\text{hydrophobic}}\).
The phospholipid \(\boldsymbol{\text{heads}}\) face toward the water because they are \(\boldsymbol{\text{hydrophilic}}\).