Calcium pools mobilized during excitation-contraction coupling in flounder intestinal smooth muscle.


The effects of Ca2+ free solutions (0 mM Ca2+/5mM EGTA) and low Ca2+ media (no added Ca2+) on the 100 mM K+ and 10(-5) M ACh contractions of the flounder intestine were examined. Ca2+-free solutions abolished the K+-contractions and reduced the normal ACh response to a smaller transient event. Low Ca2+ media blocked the prolonged tonic phase of the K… (More)


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