Cell Transport Mechanisms Quiz

What is the main difference between facilitated diffusion and active transport?

• Facilitated diffusion is a type of active transport.

• Facilitated diffusion uses channel proteins, while active transport uses energy to move molecules against the gradient.

• Facilitated diffusion moves molecules against the concentration gradient, while active transport moves them along the gradient.

• Facilitated diffusion requires energy, while active transport does not.

Which of the following molecules can freely diffuse across the cell membrane?

• Sodium ions

• Glucose

• Proteins

• Oxygen

Which of the following is an example of passive transport?

• Exocytosis

• Endocytosis

• Facilitated diffusion

• Sodium-potassium pump

What role do carrier proteins play in facilitated transport?

• They create a barrier to prevent molecule movement.

• They change shape to move molecules across the membrane.

• They provide energy for the transport process.

• They break down molecules before transport.

How does the sodium-potassium pump contribute to nerve impulse transmission?

• By maintaining a constant concentration of ions inside the cell.

• By creating a potential difference across the membrane.

• By allowing free movement of ions across the membrane.

• By using glucose to generate energy for the cell.

What is the primary function of the sodium-potassium pump?

• To move sodium ions out of the cell and potassium ions into the cell.

• To move sodium ions into the cell and potassium ions out of the cell.

• To transport oxygen and carbon dioxide across the membrane.

• To facilitate the diffusion of glucose across the membrane.

Which process involves the cell membrane folding inward to bring materials into the cell?

• Exocytosis

• Facilitated diffusion

• Active transport

• Endocytosis

What is phagocytosis?

• The process of expelling waste from the cell.

• The ingestion of liquid droplets by the cell.

• The ingestion of solid particles by the cell.

• The movement of ions across the cell membrane.

How does exocytosis differ from endocytosis?

• Exocytosis involves the intake of materials, while endocytosis involves the release of materials.

• Exocytosis involves the release of materials, while endocytosis involves the intake of materials.

• Both processes involve the intake of materials.

• Both processes involve the release of materials.

What is the role of vesicles in endocytosis?

• To provide energy for the transport process.

• To carry particles into the cell and release them into the cytoplasm.

• To create a barrier to prevent molecule movement.

• To break down molecules before transport.