Part A
To view the animation, click here. Then click on structure A in the image to start the animation.
Correct
The protein is allowing solute molecules to enter the cell.
Part B
Correct
Ions, such as hydrogen ions, and hydrophilic molecules, such as water and glucose, cannot rapidly pass directly through the phospholipids of a plasma membrane. To move rapidly through the membrane, they must pass through membrane transport proteins.
