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: Pharmacology
The μ opioid receptor is responsible for the following effects: 
Select and explain. 
A. Miosis, B. Bradycardia, C. Hypothermia, D. Bronchodilation
A: Miosis
Answer: A: Miosis 
Explanation: None