Cell Transport and Membrane Structure

A stable internal environment is best known as:

Which organelle helps to control what enters & exits the cell?

• Cell wall

• Cell membrane

• Mitochondria

• Chloroplast

Why is the structure of the cell membrane referred to as a "phospholipid bilayer"?

Which type of transport does not require energy?

• Passive transport

• Active transport

Proteins help with:

• Cell/molecule identification

• Helping the structure of the membrane to remain fluid/flexible

• Allowing large or charged molecules to pass in and out of the cell

• Make up the overall structure of the cell membrane

Why does active transport require energy? Be Specific about how molecules are moving!

Which of the following best describes endocytosis?

• When molecules are expelled, or pushed out, by the cell.

• When a protein is used to bring molecules into the cell.

• When a protein is used to push molecules out of the cell.

• When the cell engulfs molecules.

In __________, molecules or wastes are pushed out of the cell.