Osmosis Review

What is the function of the plasma membrane?

• Rigid boundary around the cell

• Flexible boundary that regulates what comes in and out of the cell

• Sorts and packages items in the cell

• Storage

_____________ means there is a GREATER concentration of solute molecules OUTSIDE the cell than inside.

• isotonic
• neutral
• hypertonic
• hypotonic

_____________ means there is a LOWER concentration of solute molecules OUTSIDE the cell than inside.

• isotonic
• hypertonic
• saturated
• hypotonic

_____________ means there is the SAME concentration of solute molecules outside the cell as inside.

• Isobaric
• Hypertonic
• Hypotonic
• Isotonic

During diffusion, molecules tend to move ...

• from higher concentration to lower concentration
• against the concentration gradient

• in random directions without any pattern
• from lower concentration to higher concentration

When the concentration gradient of a solute inside and outside a cell is the same, the cell has reached ...

• osmosis
• diffusion
• equilibrium
• homeostasis

The diffusion of water across a selectively permeable membrane is called ...

• osmosis
• diffusion
• filtration
• active transport

Energy for active transport (ATP) comes from a cell's ...

• Mitochondria

• Golgi

• Nucleus

• Cell Membrane

Tags

NGSS.HS-LS1-7

__________ requires energy from ATP to move substances across membranes.

• Active transport
• Osmosis
• Facilitated diffusion
• Passive transport

When molecules move DOWN the concentration gradient, it means they are moving from an area of ___________ to ___________ concentration.

• lower to higher
• higher to lower
• none to some
• equal to equal