Cool Acrid Herbs that Release the Exterior

What are the entering channels of Ge Gen (peurariae radix)?

Ge Gen releases the muscle layer (muscles = SP), generates body fluids to alleviate thirst (body fluids = ST yin), and raises SP yang to stop diarrhea.

Source: Bensky, D. (2004). Chinese Herbal Medicine: Materia Medica. Seattle, WA: Eastland Press. p. 71 [Q354]