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To assess the molecular basis of disturbances in transmembraneous transport of Na + , we studied the response of cardiac ( Na , K ) - ATPase to NO - deficient hypertension induced in rats by NO - synthase inhibition with 40 mg / kg / day N ( G ) - nitro - L - arginine methyl ester ( L - NAME ) for 4 four weeks .
 Na, Na, K, NO, hypertension, NO, N ( G ) - nitro - L - arginine methyl ester, L - NAME
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Na, Na, K, NO, hypertension, NO, N ( G ) - nitro - L - arginine methyl ester, L - NAME