Figure 2. A representative recording of the effect of 3.5 mM isoflurane on a calcium-induced force transient of a muscle fiber bundle is shown compared with that of 30 mM caffeine (A). The transients are normalized to maximal force, as in A. [Ca²⁺]-force relations of the same muscle fiber preparation with or without 30 mM caffeine or isoflurane are given in B. The Ca²⁺transients with isoflurane and caffeine are shown in C.