Cell Transport and Membranes

What is passive transport?

• Process of molecules moving across a cell membrane against the concentration gradient.

• Process of molecules moving within a cell without using energy.

• Process of molecules moving across a cell membrane using energy.

• Process of molecules moving across a cell membrane without using energy.

Give an example of passive transport.

• Osmosis

• Active transport

• Endocytosis

• Diffusion

What is active transport?

• The movement of molecules across a cell membrane with their concentration gradient, requiring the use of energy from ATP.

• The movement of molecules across a cell membrane without the use of energy from ATP.

• The movement of molecules across a cell membrane with their concentration gradient, without the use of energy from ATP.

• The movement of molecules across a cell membrane against their concentration gradient, requiring the use of energy from ATP.

Define osmosis.

• The movement of solvent molecules from an area of lower solute concentration to an area of higher solute concentration through a semipermeable membrane.

• The movement of solute molecules from an area of higher solute concentration to an area of lower solute concentration through a semipermeable membrane.

• The movement of solvent molecules from an area of lower solute concentration to an area of lower solute concentration through a semipermeable membrane.

• The movement of solvent molecules from an area of higher solute concentration to an area of lower solute concentration through a semipermeable membrane.

What is the difference between hypertonic and hypotonic solutions?

• Hypotonic solutions have a higher concentration of solutes than hypertonic solutions.

• Hypertonic solutions have a higher concentration of solutes than hypotonic solutions.

• Hypertonic solutions have a lower concentration of solutes than hypotonic solutions.

• The difference between hypertonic and hypotonic solutions is the concentration of solutes and the direction of water movement.

How does endocytosis work?

• Cells engulf molecules or particles with their cell membrane.

• Cells absorb molecules or particles through their cell membrane.

• Cells release molecules or particles from their cell membrane.

• Cells divide and multiply to engulf molecules or particles.

What are the two types of endocytosis?

• exocytosis and receptor-mediated endocytosis

• osmosis and diffusion

• phagocytosis and pinocytosis

• active transport and facilitated diffusion