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Fig. 8. Heart function curves showing the effect of increasing the input pressure
on five cardiac variables at two epinephrine concentrations at 15°C: ( 0 ) 0.01
pg/nil epinephrine in saline; ( A ) 0.1 pg/nd epinephrine in saline. The experiments
were carried out on the in uitro trout heart, Salmo gairdneri. The arrows above the
graphs indicate the range over which the pairs of values are significantly different.
The probability that the difference results from chance alone for each pressure level
is given above each arrow. Each point on each graph is a mean of ten values. From
Bennion ( 1968).