Membrane Transport

Molecules will tend to spread out from an area of greater concentration to an area of lesser concentration.

• True
• False

Tags

NGSS.HS-PS1-5

Active transport allows a cell to move molecules from an area of low concentration to an area of high concentration.

• True
• False

_____________ allows some things to enter and leave cells, while keeping other things out of the cell.

• Osmosis
• Fermentation
• A selectively permeable membrane
• Metabolism

Tags

NGSS.MS-LS1-2

Diffusion is the movement of molecules from

• an area of equilibrium to an area of high concentration.
• an area of low concentration to an area of high concentration.
• an area of high concentration to an area of high concentration.
• an area of high concentration to an area of low concentration.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-4

The diffusion of water across a membrane is called

• equilibrium.
• osmosis.
• facilitated diffusion.
• active transport.

The roots of a plant contain a high concentration of minerals and the soil contains a lower concentration.  The roots absorb minerals from the soil.  This is an example of

• passive transport.
• active transport.
• diffusion
• osmosis

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Cells sometimes use energy to transport materials across the cell membrane.  This is called

• photosynthesis
• osmosis
• cellular respiration
• active transport

Which of these cell processes does NOT require energy?

• osmosis
• endocytosis
• active transport
• exocytosis

When does diffusion in cells stop?

• When vesicles burst.
• When equilibrium is reached.
• When respiration begins.
• When photosynthesis begins.

Tags

NGSS.MS-LS2-3

When the concentration of molecules on both sides of a membrane is the SAME, the solution is

• isotonic
• hypertonic
• hypotonic