Final answer:
Hyperacute rejection occurs shortly after transplantation and is characterized by specific clinical symptoms. It is mediated by preformed antibodies and complement activation products. Lymphocytes and macrophages are involved in acute and chronic graft rejection.
Step-by-step explanation:
Hyperacute rejection occurs within minutes to hours after transplantation. It is manifested clinically as a sudden cessation of urine output, along with fever and pain in the area of the graft site. This immediate rejection is mediated by preformed antibodies and complement activation products. Lymphocytes and macrophages are associated with acute and chronic graft rejection.
Hyperacute graft rejection is a type of rejection that occurs shortly after transplantation, usually within minutes to hours. It is characterized by the sudden cessation of urine output, fever, and pain in the graft area. This type of rejection is mediated by preformed antibodies and complement activation products. On the other hand, lymphocytes and macrophages play a role in acute and chronic graft rejection.