Fig. 4.

A: tension traces from a mucosa-intact SCT rat bladder sheet (top) and partially mucosa-denuded SCT rat sheet (bottom). Dissection of the mucosa from half of the surface area of the SCT rat bladder sheet resulted in a significant decrease in the contractile activity. B: Ca²⁺ transient trace map from a partially denuded normal adult rat bladder sheet. The denuded region is denoted by the boxed region. Intrinsic Ca²⁺ transients originate from the mucosa-intact region and did not appear to propagate into the denuded area.