Question

1. the cell membrane maintains homeostasis within a cell by controlling what *0/2 goes in and out. the plasma membrane is made up of hydrophobic fatty acid tails and hydrophilic heads. using the image below, what structure does the letter a represent? transport protein phosphate heads fatty acid tails phospholipid bilayer

Explanation:

The cell membrane's structure is a phospholipid bilayer. The phospholipid bilayer is composed of two layers of phospholipids. Each phospholipid has a hydrophilic phosphate head and hydrophobic fatty - acid tails. The label "A" in the diagram encompasses the entire double - layer structure of phospholipids.

• Transport protein (incorrect): Transport proteins are embedded within the membrane (like structure B in the diagram), not the overall bilayer.
• Phosphate Heads (incorrect): Phosphate heads are the individual hydrophilic parts of phospholipids (part of the bilayer but not the whole structure A).
• Fatty Acid Tails (incorrect): Fatty acid tails are the hydrophobic parts of phospholipids (part of the bilayer but not the whole structure A).

Answer:

Phospholipid Bilayer