Understanding Cell Transport Mechanisms

What is the primary function of the cell membrane?

• To provide energy to the cell

• To regulate the movement of substances in and out of the cell

• To produce proteins

• To store genetic information

Which of the following is NOT a type of passive transport?

• Endocytosis

• Diffusion

• Facilitated diffusion

• Osmosis

How do molecules move during diffusion?

• Only with the help of energy

• From low concentration to high concentration

• From high concentration to low concentration

• Randomly without any concentration gradient

What role do protein channels play in facilitated diffusion?

• They assist larger molecules in crossing the cell membrane

• They store molecules for later use

• They prevent molecules from entering the cell

• They provide energy for the process

What is osmosis specifically the diffusion of?

• Ions

• Glucose

• Water molecules

• Proteins

In a hypertonic solution, what happens to a cell?

• It shrinks

• It remains the same

• It bursts

• It swells

Which type of transport requires energy?

• Passive transport

• Diffusion

• Osmosis

• Active transport

What is the function of protein pumps in active transport?

• To facilitate osmosis

• To store energy

• To move molecules from low to high concentration

• To move molecules from high to low concentration

What is endocytosis?

• The movement of ions across the cell membrane

• The process of releasing materials out of the cell

• The diffusion of water molecules

• The process of bringing materials into the cell

Which of the following is an example of exocytosis?

• Oxygen diffusing into the cell

• Waste being expelled from the cell

• Water entering the cell

• Glucose entering the cell