What is the natural tendency of particles in terms of concentration?

• They move randomly without any pattern.

• They remain stationary.

• They move from low to high concentration.

• They move from high to low concentration.

Which of the following is an example of simple diffusion?

• Sodium ions being pumped out of a cell.

• Water moving through a transport protein.

• Oxygen passing through the phospholipid bilayer.

• Glucose entering a cell through a protein channel.

What is facilitated diffusion?

• Movement of water through a membrane.

• Active transport of particles using ATP.

• Random movement of particles in a solution.

• Movement of particles through a transport protein from high to low concentration.

Which process is a special case of facilitated diffusion?

• Endocytosis

• Active transport

• Osmosis

• Simple diffusion

How do particles move in relation to each other during passive transport?

• They do not move at all.

• They move independently based on their own concentration gradients.

• They move together as a group.

• They move in opposite directions.

What is required for active transport to occur?

• A concentration gradient

• ATP energy

• A passive transport protein

• A large particle

Why might a cell use active transport?

• To allow particles to move freely

• To maintain equilibrium

• To concentrate particles in a specific area

• To reduce energy consumption

What is endocytosis?

• The passive diffusion of small molecules

• The process of particles exiting a cell

• The process of particles entering a cell

• The movement of water across a membrane

Which process involves the release of large particles from a cell?

• Osmosis

• Exocytosis

• Endocytosis

• Facilitated diffusion

What happens to the membrane during exocytosis?

• It forms a new layer.

• It shrinks and becomes rigid.

• It dissolves completely.

• It merges with a vesicle to release contents.