A(n) _____________ disease is a disease in which the body is unable to recognize its own tissue.

Correct Answer: C

Rationale: The correct answer is C: Autoimmune. In an autoimmune disease, the body's immune system mistakenly attacks its own tissues, unable to differentiate between self and non-self antigens. This results in inflammation and tissue damage. Opportunistic diseases occur when the immune system is weakened, not due to a failure in self-recognition. Progressive diseases refer to conditions that worsen over time, not specifically related to self-recognition. Infectious diseases are caused by pathogens, not by the body's immune system attacking itself.

Correct Answer: B

Rationale: The correct answer is B: Algor mortis. Algor mortis refers to the cooling of the body after death. This process occurs as the body temperature gradually decreases to match the surrounding environment. Rigor mortis (A) is the stiffening of muscles after death, Livor mortis (C) is the pooling of blood in the dependent parts of the body, and Algae mortis (D) is not a recognized term in forensic science. Thus, the correct term for the cooling of the body after death is Algor mortis.

Correct Answer: A

Rationale: Thrombophlebitis involves clotting; anticoagulants prevent further clot formation.

Correct Answer: A

Rationale: Boric acid is toxic and unsafe for eye use; the nurse must correct this practice.

Correct Answer: C

Rationale: Regular exercise lowers resting pulse and blood pressure.