磷脂酶C(phospholipase C)水解phosphatidylinositol 4,5-bisphosphate(\mathrm{PIP}_{2}),直接產生的次級訊息傳遞者(second messenger)包括下列何者?
\mathrm{PIP}_{2}
二醯基甘油(diacylglycerol)
磷脂醯肌醇(phosphatidylinositol)
cAMP
cGMP