Go back to Item VII and make a different choice. Go back to Item VI and try again. Item XIIIc Quite the contrary. The ventricle beating at such a rate, under the impetus of regular stimuli from the SA node, spends so much of its time in either controlled contraction or in a refractory state, so to speak, that there is little opportunity for the slow inherent rhythmicity of the ventricle to be manifest. I'd suggest that a look into your textbook of physiology might help clear up points such as those.
Item IVc Sorry, wrong choice .
In Item I, by the way, it came out that BF might require some special treatment to volatilize it, but that's another question. Go back to Item IV and choose again. Item Ib Sorry , ether was readily given in an open system although it could be given in a closed system. TF, like halothane, might well require the aid of a volatilizer or vaporizer because of its relatively high boiling point. In practice, halothane is given in a closed system that contains a carefully and finely calibrated vaporizer that permits precise adjustment of the dose of this potent agent.