Crying: The Mystery of Tears

ability able adult animals appear asked associated average better blood body called cause changes Chapter chemical collect concentration considered continuous cried crying behavior crying episodes crying frequency depression determine effects emotional crying emotional stress examine experience express feel felt female flow function give hormones human important included increased indicated individuals involved irritant tears lacrimal gland less levels male manganese month movie nerve never normal occur onions pain patient perhaps persons play possible problem produce prolactin protein questionnaire reasons received release reported response role scientific secretion seems seen shed emotional tears shed tears similar situation someone sometimes specific stimulate stop strong subjects substances suggest surface sympathetic talk theory thought tion tional types University usually wanted weeping woman women writes wrote