Correct Answer: A

Rationale: The correct answer is A because hyperventilating James with 100% oxygen before and after suctioning can lead to oxygen toxicity. The rationale is as follows: 1. Hyperventilation with 100% oxygen can lead to increased oxygen levels in the blood, potentially causing oxygen toxicity. 2. Oxygen toxicity can result in lung damage and other complications. 3. It is not recommended to administer 100% oxygen continuously, especially in high concentrations. Therefore, Wilma committing an error by hyperventilating James with 100% oxygen. Other choices are incorrect because B is a common practice to help loosen secretions, C is correct suctioning technique, and D is a reasonable frequency for suctioning depending on the client's condition.

Correct Answer: B

Rationale: The correct answer is B: Suppressor T cells. Suppressor T cells regulate the immune response by inhibiting the activity of other immune cells to prevent overreaction and maintain immune balance. They play a crucial role in preventing autoimmune diseases and excessive inflammation. Plasma cells (A) produce antibodies, Helper T cells (C) assist in activating other immune cells, and B lymphocytes (D) are involved in antibody production. Suppressor T cells specifically have the function of shutting down immune responses, making them the immune system’s shutoff mechanism.

Correct Answer: C

Rationale: The correct answer is C: Position lower extremities below level of heart. This intervention helps improve blood flow and perfusion to the lower extremities by utilizing gravity to assist in venous return. This is crucial for clients at risk for ineffective tissue perfusion post-cardiac surgery. A: Restricting fluid intake may lead to dehydration, which can worsen tissue perfusion. B: Ensuring the client avoids prolonged sitting is important for preventing blood clots, but it does not directly address tissue perfusion. D: Instructing the client to avoid leg exercises may hinder circulation and exacerbate issues related to tissue perfusion.

Correct Answer: C

Rationale: The normal range for intraocular pressure (IOP) is approximately 10-21 mm Hg. Choice C has an IOP of 11 mm Hg, falling within this normal range, making it the correct answer. Choices A, B, and D are outside the normal range, with A being too low and B and D being too high, indicating abnormal IOP levels. Choice A (8 mm Hg) is below the normal range, while choices B (25 mm Hg) and D (28 mm Hg) are above the normal range, therefore, they are incorrect answers.

Correct Answer: B

Rationale: The correct answer is B: Presence of flatus. This indicates normal gastrointestinal function post-bowel resection. Flatus production signifies peristalsis and passage of gas through the intestines, indicating that the bowels are working. A, firm abdomen, may indicate distention or ileus, not normal function. C, excessive thirst, is unrelated to bowel function. D, absent bowel sounds, may indicate ileus or bowel obstruction, not normal function.