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5 Written questions

5 Matching questions

  1. Types of Transport Across Membranes: Passive Transport
  2. Membranes at Work 2. Kidney Dialysis
  3. Cell Membrane Function: A Biological Barrier
  4. Hypotonic solution,
  5. Receptor - mediated endocytosi
  1. a a cell membrane prevents many materials from entering the cell.
  2. b has a lower concentration of solute compared to inside the cell
  3. c movement across cell membranes without an input of energy
    2 reasons molecules move.
    1. Brownian Motion
    2. Concentration gradients
  4. d filters toxic wastes that accumulate in the blood while retaining necessary proteins, glucose, amino acids & ions
  5. e receptors, like antennae, detect specific compounds or cells and bind with them, triggering endocytosis.

5 Multiple choice questions

  1. has a higher concentration of solute compared to the inside of the cell
  2. 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. a) phagocytosis - when cells "eat" by taking in large particles or other cells
    b) pinocytosis - when cells "drink" by taking in droplets of fluid
  4. have 3-D shapes that make them highly selective, recognizing atoms or molecules by shape, size or charge.
  5. the movement of only certain substances across the cell membrane

5 True/False questions

  1. Three Types of Passive Transport: 1. Diffusionthe net movement of particles from an area of high concentration to an area of low concentration
    - no energy is expended
    - in a cell very small particles can cross the cell membrane by moving between the phospholipid molecules


  2. Active Transportthe use of vesicles to facilitate movement of substances that are too large to enter or exit the cell via transport proteins


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


  4. The activities of a living cell depend on the ability of its membrane todiffusion of molecules across the cell membrane by way of transport proteins.


  5. Three Types of Passive Transport 2.Osmosisthe diffusion of water molecules across a membrane (water molecules move from where they are more highly concentrated to where they are less concentrated)