Question

the structure of the cell membrane allows it to be selectively permeable. what is the name for the larger, brown structure in the diagram? a lipid bilayer b protein channel c hydrophilic heads d hydrophobic tails what is the purpose of your answer for question #1? a can only move substance into the cell with the use of atp

Explanation:

The cell - membrane's main structural component is the lipid bilayer which is the larger brown structure in a typical cell - membrane diagram. The lipid bilayer forms the basic framework of the cell membrane and is responsible for its selective permeability. It consists of two layers of phospholipids with hydrophilic heads and hydrophobic tails. Protein channels are embedded in the lipid bilayer and are usually smaller in comparison. Hydrophilic heads and hydrophobic tails are parts of the phospholipids that make up the lipid bilayer and are not the larger brown structure on their own.
For the second part, the lipid bilayer acts as a barrier that controls the movement of substances in and out of the cell. It is semi - permeable, allowing some substances to pass through while blocking others. It does not require ATP for basic barrier function; ATP is mainly involved in active transport processes which are often facilitated by proteins in the membrane.

Answer:

1. A. lipid bilayer
2. None of the given options are correct as the purpose of the lipid bilayer is to form a semi - permeable barrier for the cell, not to move substances into the cell with the use of ATP.