Osmosis, Diffusion, and Active Transport

Diffusion is when.......

Water moves across membranes to where there is less water

What does Active Transport require?

• energy

• cells

• transport proteins

• membrane

Tags

NGSS.HS-LS2-3

What type of molecules does Active Transport use?

• small

• meduim

• huge

• large

• tiny

What is the primary difference between diffusion and active transport in cells?

• Diffusion requires energy, while active transport does not.

• Active transport requires energy, while diffusion does not.

• Both processes require energy.

• Neither process requires energy.

Tags

NGSS.HS-LS2-3

Which statement best describes active transport?

• It is the movement of molecules from an area of lower concentration to an area of higher concentration without the use of energy.

• It is the movement of water molecules across a semi-permeable membrane from an area of low solute concentration to an area of high solute concentration.

• It involves the movement of molecules across a cell membrane from an area of lower concentration to an area of higher concentration, requiring energy.

• It is a passive process that does not require energy and relies on the natural motion of molecules.

The image below represents a cell with a semipermeable membrane. The process of osmosis would explain the net movement of water into a cell if the initial percentage of

• protein was 35% inside the cell and 30% outside the cell.

• water was 95% inside the cell and 90% outside the cell.

• water was 90% inside the cell and 95% outside the cell

• protein was 30% inside the cell and 35% outside the cell.

Tags

NGSS.MS-LS1-2

Which of the following is an example of diffusion in cells?

• Movement of glucose into a cell against its concentration gradient.

• Movement of oxygen from an area of high concentration to an area of low concentration.

• Movement of sodium ions out of a cell using ATP.

• Movement of water through a semi-permeable membrane.

What is the main energy source for active transport in cells?

• Glucose

• ATP

• Oxygen

• Water

Molecules move from area of low concentration to area of high concentration is __________.