Echoes of the past. Reflections on the early history of the concept of "active transport".
D000818:Animals; D001001:Anura; D001693:Biological Transport, Active; D005060:Europe; D049672:History, 19th Century; D049673:History, 20th Century; D066298:In Vitro Techniques; D010827:Physiology / Q000266:history*; D014481:United States