cells

• State the function of the nucleus

  Controls all activities of the cell and contains genetic material
• State the function of the cytoplasm

  Site for chemical reactions to take place
• State the function of The cell membrane

  Controls what substances leave and enter the cell
• State the function of The mitochondria

  Site of aerobic respiration, releasing energy
• State the function of The ribosomes

  Site of protein synthesis
• State the function of The cell wall

  Strengthens the cell
• State the function of The chloroplasts

  Contains chlorophyll and absorbs light to photosynthesis
• State the function of The permanent vacuole

  Contains cell sap to keep plant cells rigid and provide support
• Why do sperm cells have lots of mitochondria

  To provide lots of energy for swimming
• What is the structure of a sperm cell that contains digestive enzymes to break down the surface of an egg cell?

  Acrosome
• Describe the adaptations of a nerve cell

  lots of dendrites;long axon
• Function of a nerve cell

  Carry electrical impulses
• Root hair cells have lots of mitochondria to release energy. What is the energy used for?

  Active transport of mineral ions into root hair cells
• How do the extensions in root hair cells help with their function?

  Increase surface area for efficient water absorption
• Define diffusion

  Net movement of particles From a high concentration to a low concentration down concentration gradient
• Define net movement

  overall movement
• Explain why a higher temp results in faster diffusion

  More kinetic energy so particles move around more
• Name a substance that diffuses into our cells for use

  Oxygen or glucose
• Name a substance that diffuses Out of our cells to be removed

  Carbon dioxide
• Define osmosis

  Net movement of water molecules down the water concentration gradient through a partially permeable membrane
• Define dilute

  A solution with a high water concentration but low solute concentration
• Define concentrated

  A solution with a low water concentration but high solute concentration
• What are partially permeable membranes

  Membranes that only allow certain substances to pass through
• Define active transport

  Movement of particles against the concentration gradient