This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Adrenaline acts through 
Select and explain. 
A. Single pass receptor, B. Four pass receptor, C. Seven pass receptor, D. Ligand gated channel
C: Seven pass receptor
Answer: C: Seven pass receptor 
Explanation: Adrenaline, noradrenaline and dopamine acts via seven pass receptor or Serpentine receptor.