Answer:
The correct answer is - option D. gate- control theory of pain.
Explanation:
Gate control theory of pain suggests that non painful stimulus that inhibits or closes the the gates for the stimulus of the pain. This mechanism helps in the prevention of of the pain sensation to travel to the CNS. It is also refereed as the doorway in the spinal cord that is passed from the signals.
Thus, the correct answer is - option D. gate- control theory of pain.
I’m pretty sure the answer is A because carbon dioxide causes a solution to turn yellow and a solution that indicates no carbon dioxide would be blue instead of green.
