Final answer:
Rebound tenderness and guarding are two peritoneal signs in the abdominal exam.
Step-by-step explanation:
Two peritoneal signs in the abdominal exam are rebound tenderness and guarding.
Rebound tenderness is an increase in pain when pressure is removed from the abdomen, indicating peritoneal irritation. It is usually assessed by applying gentle pressure to the abdomen and then quickly releasing.
Guarding is the voluntary contraction of the abdominal muscles in response to palpation or movement. It is a protective mechanism to minimize pain and prevent further injury to the peritoneum.