Study

Movement Into and Out of Cell

  •   0%
  •  0     0     0

  • Mention 2 examples of active transport
    uptake of glucose by epithelial cells in the villi of the small intestine, uptake of ions from soil water by root hair cells in plants
  • What is turgid condition?
    When water moves into a plant cell, the vacuole gets bigger, pushing the cell membrane against the cell wall.
  • State the name of the process by which water molecules move into plant roots
    osmosis
  • Some substances move into cells by the process of diffusion. State the name of the outer part of an animal cell that substances move through during diffusion.
    Cell membrane
  • Which of the following statements would be correct for both diffusion and osmosis?
    C
  • What is plasmolyzed condition?
    he process of contraction or shrinkage of the protoplasm of a plant cell and is caused due to the loss of water in the cell
  • Describe the ways in which diffusion is different to active transport
    look the table
  • Give 2 examples in diffusion in our daily life
    spraying a perfume, making a tea, dissolve the sugar in the water
  • A plant absorbs a number of substances into its roots. Which row of the table below correctly shows the substances absorbed by the roots and how these substances are absorbed?
    A
  • What condition about this picture? Explain your answer
    Osmosis
  • Gas exchange occurs at the alveoli. Describe how oxygen molecules move from the alveoli into the blood.
    diffusion, across (cell / permeable) membranes, high concentration to low concentration (of O2 )
  • A plant was not watered for one week. Look at a series of photographs of the plant during the week. Explain how the lack of water has affected the support of the leaves of the plant shown in the photographs. Use the term turgor pressure
    lack of turgor pressure, (mesophyll) cells not providing support / cell collapses, (lack of water means cells become) plasmolyse ;
  • The diagram shows a palisade mesophyll cell and the same palisade mesophyll cell after it has been placed in a concentrated sugar solution for twenty minutes. Explain why the cell in the second diagram changed
    water moves out of the cell, osmosis, sugar solution more concentrated than cell contents
  • What causes the diffusion of carbon dioxide out of a living cell?
    Random movement of molecules (kinetic energy)
  • How does a water vapour molecule move out of the air space of a leaf into the atmosphere on a dry day?
    Diffusion
  • Give 2 examples of osmosis
    The absorption of water from the soil, Potato In Sugar Solution
  • Mention 3 factors that influence diffusion
    Surface area to volume ratio, Concentration Gradient, temperature
  • A plant absorbs a number of substances into its roots. Which row of the table below correctly shows the substances absorbed by the roots and how these substances are absorbed?
    A
  • What kind of condition in this picture? Explain your answer!
    Diffusion
  • Water is an essential molecule for life. Complete the statements. Water moves into and out of cells by ........................ Water is known as a ................... because it can dissolves a solute, resulting in a solution
    Osmosis and Solvent