Fig. 5. The relationship between [CaCl²] and (A ) force or (B ) F³⁴⁰:F³⁸⁰in the presence of 10 μm acetylcholine (ACh), according to the protocol indicated in figure 4. Closed circles indicate values measured during the initial exposure to CaCl², open circles indicate values measured in the presence of 5.5 mm hexanol, and gray circles indicate values after washout of hexanol. Values are mean ± SD, expressed as a percentage of the initial response to 2.4 mm CaCl²(n = 5).