Chapter 7 Review

The plasma membrane has _________ ___________.

The plasma membrane is composed of the ____________ _______.

A phospholipid molecule is composed of a ________ ________, two fatty acid chains, and a phosphate group.

• What provides pathways for substances to enter and leave? _______

Movement of particles across the cell membrane without using energy

• Passive Transport

• Active Transport

• Action Transport

• From an area of high concentration to an area of lower concentration, this process is called?

What best describes dynamic equilibrium?

• • Reached when diffusion of material into the cell equals diffusion of material out of the cell

• Molecules continue to move, but the most concentration remains the same.

• • Reached when diffusion of material into the cell equals diffusion of material in of the cell

• • Reached when diffusion of material into the cell moves faster diffusion of material out of the cell

What protein is this?

Diffusion of water across a _________ _________ membrane.

• Process by which the cell surrounds and takes particles into the cell