What is the intracellular signaling molecule that causes the mechanism above to happen? said another way: you were told that smooth muscle is more responsive to hormone and that this did something to...

Extracted text: What is the intracellular signaling molecule that causes the mechanism above to happen? said another way: you were told that smooth muscle is more responsive to hormone and that this did something to receptors. From here you had to decide above if this is up or downregulation of receptors and if this occurs via endo or exocytosis. What is the intracellular signal that makes this endo or exocytosis happen? Intracellular concentration rises for CAMP Intracellular concentration rises for calcium Intracellular concentration rises for potassium G-proteins are activated Kinases are activated