Biology  by Bradford
support

B3.1 Gas exchange: grass skirts

20 quick questions on gas exchange, 16 of them at standard level, each answered in a word or two. Print a sheet for each team, a key for the checker and a tick sheet, then tape the sheets to the board and race.

How it runs

  1. SnipA runner cuts one strip off the bottom of their team’s sheet.
  2. Answer as a pairBack at the table, they write the answer on the strip. No books.
  3. Get it checkedThe checker reads it against the key: you, or a student holding it.
  4. Back for the nextA tick earns the next strip. Wrong? Back to the table to try again.

The questions on this sheet

The checker’s key, with every answer, prints with the sheets.
  1. Air sac at the end of a bronchiole
  2. Narrow branching airway ending in alveoli
  3. Coating that stops alveoli collapsing
  4. Fish organs ventilated with water
  5. Moving air in and out of the lungs
  6. Dome-shaped muscle that flattens to inhale
  7. Air moved in one normal breath
  8. Waterproof layer covering the epidermis
  9. Bean-shaped cell controlling a pore
  10. Pore through which CO₂ enters a leaf
  11. Loss of water vapour from leaves
  12. Contract to lift the ribcage when inhaling
  13. Pull the ribs down in forced exhalation
  14. Most air exhaled after a maximal breath in
  15. Loose leaf cells with large air spaces
  16. Number of pores per mm² of leaf
  17. CO₂ lowering haemoglobin's O₂ affinity
  18. Unborn baby's O₂ carrier, higher affinity
  19. Plot of haemoglobin saturation against pO₂
  20. Each O₂ taken up makes the next easier

More on this topic