<prompt> Animal used to demonstrate anaphylaxis in the lab is -RabbitAdult miceMonkeyGuinea Pig  <response>: Anaaphylaxis in vitro : isolated tissues, such as intestinal or uterine muscle strip from sensitised guinea pig ,held in a bath of ringers solution will contract vigorously on addition of the specific antigen to the bath. This is known as Schultz Dale phenomenon. Reference : Anathanarayan panikers 9th edition, pg no: 164 p 