Movement of Material

What is diffusion?

• The movement of molecules or particles from an area of low concentration to an area of high concentration.

• The movement of molecules or particles from an area of high concentration to an area of equal concentration.

• The movement of molecules or particles from an area of low concentration to an area of equal concentration.

• The movement of molecules or particles from an area of high concentration to an area of low concentration.

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 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.

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

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.

Explain passive transport.

• Passive transport is the movement of molecules from an area of low concentration to an area of high concentration.

• Passive transport is the movement of molecules across a cell membrane with the use of energy.

• Passive transport is the movement of molecules across a cell membrane without the use of energy.

• Passive transport is the movement of molecules through protein channels in the cell membrane.

What is endocytosis?

• Cellular process of synthesizing substances within a vesicle formed by the cell membrane.

• Cellular process of engulfing substances into a vesicle formed by the cell membrane.

• Cellular process of breaking down substances within a vesicle formed by the cell membrane.

• Cellular process of releasing substances from a vesicle formed by the cell membrane.

Which process requires energy: diffusion or active transport?

• osmosis

• diffusion

• active transport

• facilitated diffusion

In which direction does water move in osmosis?

• From an area of lower solute concentration to an area of higher solute concentration.

• Water does not move in osmosis.

• From an area of higher solute concentration to an area of lower solute concentration.

• Water moves in both directions in osmosis.

Give an example of passive transport in plants.

• Osmosis

• Diffusion

• Active transport

• Endocytosis

What are the three types of endocytosis?

• phagocytosis, pinocytosis, and receptor-mediated endocytosis

• endocytosis, exocytosis, and diffusion.

• active transport, facilitated diffusion, and simple diffusion.

• exocytosis, osmosis, and diffusion.

How does concentration gradient affect diffusion?

• Concentration gradient has no effect on diffusion.

• Concentration gradient only affects the rate of diffusion, not the direction.

• Diffusion occurs against the concentration gradient.

• Concentration gradient determines the direction and rate of diffusion.