Q. The neurotransmitter secreted by primary afferent fibres for severe pain is: (Solved)
1. glutamate
2. acetylcholine
3. substance P
4. opioid peptides
5. noradrenaline
- d. opioid peptides
1. glutamate
2. acetylcholine
3. substance P
4. opioid peptides
5. noradrenaline