Cell Transport and Membrane Mastery

What is diffusion?

• The movement of water molecules across a cell membrane

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

• The process by which cells consume energy to move particles

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

What is osmosis?

• The diffusion of oxygen molecules

• The active transport of ions

• The diffusion of water molecules from a high to low concentration

• The movement of glucose into the cell

Passive transport differs from active transport because passive transport:

• Requires cellular energy

• Moves substances against the flow

• Does not require cellular energy

• Is only used for water transport

What is the main function of the cell membrane?

• To produce energy for the cell

• To control what enters and leaves the cell

• To store the cell's genetic information

• To conduct photosynthesis

Which of the following is a component of the cell membrane's structure?

• Nucleic acids

• Ribosomes

• Phospholipids

• Mitochondria

What happens to a cell when it is placed in a hypertonic solution?

• The cell swells because water moves into the cell

• The cell stays the same size because the concentration of solutes is balanced

• The cell shrinks because water moves out of the cell

• The cell divides because of the excess water

What is the role of transport proteins in the cell membrane?

• To synthesize proteins

• To provide structural support to the cell membrane

• To help with the transport of specific substances across the cell membrane

• To store energy for the cell

What is the role of cholesterol in the cell membrane?

• To help transport substances in and out of the cell

• To keep the membrane fluid and flexible.

• To signal the cell on when to do certain tasks.

• To identify and organize the cell.

What is the role of peripheral proteins in the cell membrane?

• They transport nutrients across the cell membrane
• They keep the cell membrane fluid and flexible.

• To identify and organize cells.

• They store genetic information for the cell

In which direction do molecules move during the process of active transport?

• From high to low concentration

• In a random direction
• From low to high concentration

• No specific direction