4713
In addition , GCC challenges processes critical for coping with the external environment ( water balance , thermoregulation , nutrition , and the immune , endocrine , and neurological systems ) , leaving organisms sensitive to even slight perturbations by chemicals when pushed to the limits of their physiological tolerance range .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None