Question

which contains phosphorus and nitrogen atoms, is polar and dissolves in water. substances that mix with water are called hydrophilic, or water - loving. the fatty acid tails are nonpolar. nonpolar molecules do not mix with water. so the nonpolar tails in a phospholipid are hydrophobic, or water - fearing. molecules that have both a hydrophilic and a hydrophobic region are called amphipathic. the model shows a simplified representation of a phospholipid and its chemical structure. (the simplified representation does not show glycerol.) image of phospholipid structure with labels: phosphate group (head), fatty acids (tails), glycerol (backbone), and chemical formula complete the sentence. a phospholipid is amphipathic because its dropdown polar and hydrophilic, and its dropdown nonpolar and hydrophobic.

Explanation:

From the text, we know that the phosphate group (head) is polar and hydrophilic, and the fatty acid tails are nonpolar and hydrophobic. A phospholipid is amphipathic because it has both a hydrophilic (polar) region and a hydrophobic (nonpolar) region. So the first blank should be "phosphate group (head)" as it's the polar and hydrophilic part, and the second blank should be "fatty acid tails" as it's the nonpolar and hydrophobic part.

Answer:

First blank: phosphate group (head)
Second blank: fatty acid tails