Final answer:
PI(4,5)P2 is associated with the cellular process of endocytosis, which involves the cell taking in material, whereas PI(4)P is linked to the process of secretion, where a cell releases substances. Thus, the correct answer for the signaling functions are D. Endocytosis, Secretion.
Step-by-step explanation:
The question relates to the signaling pathways involved in cellular processes and which compounds signal specific functions. PI(4,5)P2 and PI(4)P are phosphoinositides involved in such pathways, and the correct completion for the blanks provided would be
PI(4,5)P2: Endocytosis
PI(4)P: Secretion
Phosphatidylinositol 4,5-bisphosphate or PI(4,5)P2 is commonly associated with the process of endocytosis, where a cell engulfs material from its surroundings. On the other hand, Phosphatidylinositol 4-phosphate or PI(4)P is involved in the process of secretion, where a cell releases substances to be expelled into the extracellular environment. Therefore, the answer to the question provided is D. Endocytosis, Secretion.