Cells

• What three things do a plant cell that a animal does not?

  1. Vacuole
  2. Cell Wall
  3. Chloroplasts
• What does the Cell Membrane do?

  Controls substances leaving and entering the cell.
• What does the cytoplasm do?

  Where most of the chemical reactions take place.
• What is the role of the Nucleus?


  Controls the activities of the cell.
• What does the cell wall do?

  Contains cellulose, supports the plants structure.
• What is the role of the Chloroplast?

  Absorbs light for photosynthesis.
• What is the vacuole?

  A space filled with cell sap. (a dilute solution of sugars and mineral salts)
• What is the mitochondria?

  Site of aerobic respiration.
• What is a specialised cell?

  Specialised cells are cells that are designed to carry out a role in the body
• What is a sperm cell?

  A male reproductive cell that provides half of the needed genetic information needed to form a fertilised zygote.
• What is a root hair cell?

  A cell found in the roots of plants. The larger surface area of the root hairs allows them to absorb water.
• What is a nerve cell?

  A nerve cell, also known as a neuron, is a specialized cell that transmits electrical signals in the nervous system.
• What is a red blood cell?

  Blood cell that carries oxygen throughout the body.
• What is a white blood cell purpose?

  Immune defense.
• What is diffusion?

  Diffusion is the movement of particles from an area of high concentration to an area of low concentration.
• What is osmosis?

  Osmosis is the movement of water molecules from an area of lower solute concentration to an area of higher solute concentration across a semi-permeable membrane.
• What is the name of a specific type of plant cell that only allows some particles to pass through?

  A selectively permeable cell.
• What factors may change the rate of diffusion?

  1. Temperature
  2. Concentration
  3. Pressure
• What factors can affect the rate of osmosis?

  1. Concentration
  2. Temperature
  3. Surface area
• What is Active Transport?

  Movement of molecules across a cell membrane requiring energy.
• What is an enzyme?

  An enzyme is a protein that acts as a catalyst in biological reactions, speeding up the rate of the reaction without being consumed in the process.