2.1.1 Transport in Cells

• Facilitated diffusion involves the use of proteins to help substances cross the cell membrane
• What are the two main types of cell transport?

  Passive and active
• Order the steps involved in diffusion:

  1️⃣ Substances move from high concentration

  2️⃣ Substances move to low concentration

  3️⃣ No energy is required
• Why is cell transport important?

  Ensures nutrient intake
• Osmosis requires a selectively permeable membrane


  True
• What type of passive transport involves the movement of water across a selectively permeable membrane?

  Osmosis
• What is maintained by osmosis within cells?

  Osmotic pressure
• Match the feature with the correct type of transport:

  Substance Transported in Osmosis ↔️ Water

  Energy Input in Osmosis ↔️ No

  Membrane Required in Osmosis ↔️ Selectively permeable
• Facilitated diffusion uses carrier proteins to move substances across the cell membrane.


  True
• What is the primary purpose of cell transport?

  Ensure cells receive nutrients
• Match the type of transport with its energy requirement:

  Passive Transport ↔️ No energy required

  Active Transport ↔️ Yes (ATP)
• Passive transport requires the cell to expend energy in the form of ATP.

  False
• The two main types of cell transport across the cell membrane are passive transport and active transport
• What is cell transport?

  Substance movement across membranes
• What is osmosis?

  Water movement across membranes
• Match the type of transport with its characteristics:

  Passive Transport ↔️ No energy required

  Active Transport ↔️ ATP required

  Diffusion ↔️ High to low concentration

  Osmosis ↔️ Water movement
• What is an example of a protein involved in active transport?

  Sodium-potassium pump
• Diffusion is a type of passive transport where substances move from high to low concentration
• Passive transport requires the cell to use energy in the form of ATP

  False
• What substance is specifically transported during osmosis?

  Water
• Diffusion is a key mechanism for the movement of small, uncharged molecules across cell membranes.


  True
• Osmosis requires energy in the form of ATP to move water across the membrane.

  False
• In a hypotonic solution, water moves into the cell, potentially causing it to swell and burst.


  True
• Red blood cells placed in a hypotonic solution may swell and burst
• Facilitated diffusion allows essential nutrients to enter the cell without requiring energy
• Active transport requires ATP to move substances against their concentration gradient.


  True
• The sodium-potassium pump is an example of active transport
• What form of energy is required for active transport?

  ATP
• Passive transport requires energy input from the cell.

  False
• Match the transport type with its energy requirement and direction of movement:

  Diffusion ↔️ No energy; High to low concentration

  Active Transport ↔️ Yes (ATP); Low to high concentration
• A selectively permeable membrane allows only water to pass through during osmosis.


  True
• Facilitated diffusion requires energy from ATP.

  False
• The sodium-potassium pump uses ATP to move sodium ions out of the cell and potassium ions into
• What is an example of a pump that uses ATP in active transport?

  Sodium-potassium pump
• What are examples of small, uncharged molecules that move across cell membranes through diffusion?

  Oxygen, carbon dioxide, water
• What happens to a cell when placed in a hypertonic solution?

  It shrinks
• Match the feature with the type of transport:

  Energy Required ↔️ No

  Transport Mechanism ↔️ Carrier proteins in membrane

  Rate of Transport ↔️ Faster
• Diffusion is a type of passive transport where substances move from high to low concentration
• Active transport moves substances from low to high concentration using ATP


  True
• In passive transport, substances move from an area of high concentration to an area of low concentration