The H 1 histamine receptor is a GPCR that signals by activating phospholipase C. a. Which Ga family member does it associate with ________. b. Draw and name the two products of phospholipase C cleavage of phosphatidylinositol 4,5- bisphosphate (PIP 2 ). Which is likely to remain in the membrane and which is cytosolic? c. Describe how the two secondary messengers created from PLC cleavage of phosphatidylinositol-4,5-bisphosphate activate the same target through different pathways?