Cell Transport and Plasma Membrane

Which statement best describes the cell membrane?

• The protective outer layer that controls what enters and leaves the cell.
  

• Stores information on DNA molecules / Directs and controls the activities of the cell.
  

• A folded membrane that moves materials around inside cells / Also acts as the site of manufacturing materials needed by the cell.
  

• The smallest organelle with a huge job / Makes proteins, which are the building blocks of the body.
  

What is osmosis?

• The movement of water across a semipermeable membrane

• The movement of molecules from an area of high concentration to an area of low concentration

• The movement of molecules from an area of low concentration to an area of high concentration

• The movement of ions across a membrane

Particles move from a region of lesser concentration to greater concentration by ___.

• facilitated transport

• diffusion

• active transport

• osmosis

The process where only water is allowed to pass through the cell membrane from a high to low concentration.

• meiosis

• respiration

• diffusion

• osmosis

Which part of this phospholipid is hydrophobic?

• fatty lipid tails

• head

• all of it is hydrophobic

• none of it is hydrophobic

What kind of transport does not require energy?

• Active 

• Vacuole 

• Passive 

• Na/K Pump 

Look at the diagram of a cross-section of a cell membrane below. The cell membrane controls movement of materials into and out of the cell. The following particles are moving from high concentration to low concentration and are using a carrier protein. How would you describe this type of movement across the membrane?

• simple osmosis

• active transport

• simple diffusion

• facilitated diffusion

Which of the following is an example of active transport?

• A. Facilitated diffusion

• B. Sodium-potassium pump

• C. Endocytosis

• D. Exocytosis

What type of transport is this?

• facilitated diffusion

• active transport

• diffusion

• osmosis

Which type of transport does not require energy?

• Passive Transport

• Active Transport

• Diffusion

• Osmosis