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5 Written questions

5 Matching questions

  1. Three Types of Passive Transport
  2. Transport proteins
  3. Cell Membrane Function: A Biological Barrier
  4. Transport Across Cell Membranes: Equilibrium
  5. Two types of transport proteins
  1. a have 3-D shapes that make them highly selective, recognizing atoms or molecules by shape, size or charge.
  2. b a) carrier proteins - facilitate the diffusion of glucose across the cell membrane
    b) channel proteins - have tunnel-like pores filled with water that allow charged ions in and out of the cell
  3. c a cell membrane prevents many materials from entering the cell.
  4. d ...
  5. e a state at which molecules are evenly distributed (the concentration is equal throughout the medium)
    - molecules continue moving but equilibrium is maintained

5 Multiple choice questions

  1. the reverse of endocytosis, whereby the membrane of vesicles or vacuoles fuses with the cell membrane and the stored contents are expelled from the cell.
  2. filters toxic wastes that accumulate in the blood while retaining necessary proteins, glucose, amino acids & ions
  3. the cell membrane forms a pocket around the material to be transported, then either pinches off as a vesicle or a vacuole.
  4. Loss of water in a plant cell resulting in WILTING
  5. movement across cell membranes without an input of energy
    2 reasons molecules move.
    1. Brownian Motion
    2. Concentration gradients

5 True/False questions

  1. Two types of Endocytosis:a) phagocytosis - when cells "eat" by taking in large particles or other cells
    b) pinocytosis - when cells "drink" by taking in droplets of fluid

          

  2. Particle Model of Matterall matter is made of tiny particles

          

  3. Hypertonic solutionhas a lower concentration of solute compared to inside the cell

          

  4. Brownian Motionin a liquid or gas, particles are in constant, random motion

          

  5. Membranes at Work 1.Water Purification: Reverse osmosisfilters toxic wastes that accumulate in the blood while retaining necessary proteins, glucose, amino acids & ions