system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Substance P is increased is response to pain in periphery, by which of the following?
assistant
The correct answer is  Substance P seen at

Primary pain nerve endings in dorsal horn of spinal cord
Hypothalamus
Nigrostrial pathway of basal ganglia