Transport In Cells - CH3

    Cards (60)

    • What process describes substances moving in and out of a cell?

      Diffusion
    • Which cellular components might be involved in the movement of substances in and out of a cell?
      Organelles
    • Where do chemical particles move from during diffusion?
      High to low concentration area
    • Which states of matter can undergo diffusion?
      Liquids and gases
    • Why can't solid particles diffuse?
      They are fixed
    • What substances do cells need to take in for respiration?
      Glucose and oxygen
    • How do dissolved substances and gases move in and out of cells?
      By diffusion
    • What do cells need to get rid of?
      Waste products and chemicals
    • What is the net movement of particles from high to low concentration?
      Diffusion
    • What type of process is diffusion?
      A passive process
    • What does it mean for diffusion to be a passive process?
      It does not require energy
    • How does temperature affect the rate of diffusion?
      Higher temp increases diffusion
    • What three factors affect the rate of diffusion?
      Temperature, concentration gradient, surface area
    • How does the concentration gradient affect diffusion rate?
      Steeper increases diffusion
    • What is the concentration gradient?
      Difference in particle numbers
    • What is the relationship between concentration gradient steepness and diffusion rate?
      Steeper = faster diffusion
    • How does surface area of membrane affect diffusion rate?
      Larger increases diffusion
    • What is the term used for the difference between two areas of concentration?
      Concentration gradient
    • What happens to the rate of diffusion when there is a greater difference in concentration?
      It becomes faster
    • What type of energy means the particles are supplied with more energy?
      Thermal
    • What do particles do more of when they have more energy?
      Move
    • What substances move in and out of cells by diffusion?
      Oxygen, glucose, carbon dioxide, urea
    • What moves in and out of cells by diffusion?
      Dissolved substances
    • How are cells adapted for diffusion?
      Increased surface area
    • How are the fish gills adapted for diffusion?
      • Large surface area - more space for gaseous exchange
      • Good blood supply - maintains a steep diffusion gradient
      • Thin - short diffusion pathway
    • How are the plant roots adapted for diffusion?
      • Highly branched - large surface area for gas exchange
      • Root hair cells - increase surface area for gas exchange - can absorb more water by osmosis and mineral ions by active transport
    • How are the plant leaves adapted for diffusion?
      • Large surface area - more space for gaseous exchange
      • Thin - short diffusion pathway
      • Contain stomata (pores) - open and close to allow gas exchange
    • What cells is osmosis vital to?
      Plant cells
    • What process is defined as the diffusion of water molecules?
      Osmosis
    • What membrane is involved in osmosis?
      Partially permeable membrane
    • What is a partially permeable membrane?
      Membrane only letting certain particles pass
    • What concentration of water molecules do dilute solutions have?
      High
    • What concentration of water molecules do concentrated solutions have?
      Low
    • Why must the concentration of solutes inside body cells stay at the same level?
      For them to work properly
    • What can differences in solution concentration cause?
      Water to move in/out
    • What happens when the water concentration is lower outside the cell?
      Water moves out
    • What happens when the water concentration is higher outside the cell?

      Water moves in
    • What can happen if too much water enters an animal cell?
      The cell can burst
    • What can animal cells control to prevent cell damage due to osmosis?
      Body solution concentrations
    • What process is key to the survival of plants?
      Osmosis