Evaluation of gastrointestinal motility in awake rats: a learning exercise for undergraduate biomedical students - Souza, Miguel Ângelo Nobre e; Souza, Marcellus Henrique Loiola Ponte de; Palheta Júnior, Raimundo Campos; Cruz, Paula Rola Monteiro da; Medeiros, Bruno Amaral; Rola, Francisco Helio; Magalhães, Pedro Jorge Caldas; Troncon, Luiz Ernesto de Almeida; Santos, Armenio Aguiar dos (Advances in Physiology Education, 2009)