21192
Nax channels began to open when [ Na ( + ) ] o exceeded ~ 150 mM without ET - 3 , but opened fully at a physiological [ Na ( + ) ] o ( 135 - 145 mM ) with 1 nM ET - 3 .
 Chemical: Na ( + ); Chemical: Na ( + )
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Na ( + ); Chemical: Na ( + )