This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
Na &/or K+ is/are involved in mechanism of action of which of the following receptor(s)? 
Select and explain. 
A. Dopamine, B. Nm receptor, C. Nn receptor, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: The sodium-potassium pump is found in many cell (plasma) membranes. Powered by ATP, the pump moves sodium and potassium ions in opposite directions, each against its concentration gradient. In a single cycle of the pump, three sodium ions are extruded from and two potassium ions are impoed into the cell Ref: guyton and hall textbook of medical physiology 12 edition page number:34,35,36