“1) Prolonged exposure to DNP or TNP caused an immediate, and long-lasting increase of secretion only in the presence of Ca. (”
“3) Re-addition of 2 mM Ca during prolonged exposure to DNP or TNP produced a larger response than did the simultaneous addition of Ca and either DNP or TNP. (”
“The response to TNP in the presence of 0.5 mM Ca was slightly reduced in the absence of Na. (”