After AV node come Bundle of His (or Purkinje fibres - either will do. Note various spellings of the fibres!)
Resp surfaces Q's (and ANY Q relating to diffusion) ALWAYS needs you to mention Fick's Law.
Arteries simply respond to pressure - stretch and recoil of ELASTIC fibres (don't mention muscle fibres - that's arterioles only and nothing to do with this!)
Last edited by Happydadtoo on Thu Dec 13, 2007 8:32 pm, edited 1 time in total.