1.3.2 Osmosis

• A partially permeable membrane allows water molecules to pass through but restricts the passage of solute molecules.
• What type of diffusion is osmosis?

  Water diffusion
• What happens to a carrot when placed in salt water due to osmosis?

  Loses firmness
• What is a concentration gradient?

  Difference in substance concentration
• Why do plant cells rely on osmosis?

  Maintain turgor pressure
• What type of molecules can pass through semi-permeable membranes?

  Water molecules
• What is the driving force behind water movement across a semi-permeable membrane?

  Concentration gradient
• Match the membrane property with its description:

  Semi-Permeable ↔️ Allows water, restricts solutes

  Fully Permeable ↔️ Allows all substances

  Driving Force in Osmosis ↔️ Concentration gradient

  Water Movement in Osmosis ↔️ High to low concentration
• Osmosis occurs from an area of low water concentration to high water concentration

  False
• The concentration gradient is the driving force in osmosis


  True
• What drives substances to move in diffusion and osmosis?

  Concentration gradient
• Osmosis helps maintain hydration and electrolyte balance in animals
• Osmosis involves the movement of water from high to low concentration across a partially permeable membrane.


  True
• Water moves from areas of high water potential to low water potential during osmosis.

  True
• Diffusion involves the movement of substances from high to low concentration across a partially permeable membrane.

  False
• What drives both diffusion and osmosis?

  Concentration gradient
• Semi-permeable membranes restrict the passage of larger solute molecules.


  True
• Semi-permeable membranes allow water molecules to pass through but restrict the passage of larger solute molecules
• What is the primary role of semi-permeable membranes in living organisms?

  Facilitate osmosis
• What is the definition of a partially permeable membrane?

  Allows water, restricts solutes
• Why is osmosis essential for plant cells?

  Maintains turgor pressure
• Semi-permeable membranes are essential for preventing dehydration in organisms


  True
• Osmosis is crucial for water absorption in plant roots

  True
• Osmosis is essential for maintaining cell turgor and preventing dehydration in organisms.
• Osmosis attempts to balance the water potential on both sides of a partially permeable membrane.
• Osmosis involves the movement of water from high to low concentration across a partially permeable membrane.
• Semi-permeable membranes allow water molecules to pass through, but restrict larger solute molecules.
• The movement of water in osmosis is from an area of low water concentration to high water concentration

  False
• Osmosis is the diffusion of water molecules across a partially permeable membrane
• Water moves in osmosis from an area of high water concentration to an area of low water concentration driven by the gradient
• A concentration gradient is the difference in concentration of a substance between two areas
• Match the osmotic environment with its definition:

  Hypertonic ↔️ Higher solute concentration outside

  Isotonic ↔️ Equal solute concentration

  Hypotonic ↔️ Lower solute concentration outside