IB Biology Membrane Transport

Which of the following structures serves as the cell’s boundary from its environment?

• mitochondrion
• cell membrane
• chloroplast
• channel protein

Which of the following is a function of the cell membrane?

• breaks down lipids, carbohydrates, and proteins from foods
• stores water, salt, proteins, and carbohydrates
• keeps the cell wall in place
• regulates the movement of materials into and out of the cell

Tags

NGSS.MS-LS1-2

The cell membrane contains channels and pumps that help move materials from one side to the other. What are these channels and pumps made of?

• carbohydrates
• lipids
• bilipids
• proteins

During diffusion, when the concentration of molecules on both sides of a membrane is the same, the molecules will

• move across the membrane to the outside of the cell.
• stop moving across the membrane.
• continue to move across the membrane in both directions.
• move across the membrane to the inside of the cell.

The diffusion of water across a selectively permeable membrane is called

• osmotic pressure.
• osmosis.
• pinocytosis.
• active transport.

An animal cell that is surrounded by fresh water will burst because the osmotic pressure causes

• water to move into the cell.
• water to move out of the cell
• solutes to move into the cell.
• solutes to move out of the cell.

Which means of particle transport requires input of energy from the cell?

• diffusion
• osmosis
• facilitated diffusion
• active transport

Which means of particle transport is shown in this diagram?

• diffusion
• osmosis
• facilitated diffusion
• active transport

Which means of particle transport is shown in this diagram?

• endocytosis
• exocytosis
• facilitated diffusion
• protein pump

Look at the cross section of a cell membrane of a eukaryotic cell. H+ ions are being pumped from a low concentration to a high concentration. 
How do you describe this type of transport across the cell membrane?

• active transport
• passive transport
• facilitated diffusion
• co-transport