Answer:
The situation can be explained as below -
Step-by-step explanation:
As Chris has been found to be contaminated with the pesticide of the category organophosphate, these organophosphates inhibit the enzyme acetylcholinesterase which destroys the acetylcholine. Acetylcholine is a chemical stimulator of muscle fibers and needs to be destroyed after it has performed its action. As it is not getting destroyed thus muscles are continuously being stimulated and as a result he is feeling spasm in muscles.