Correct Answer: B

Rationale: The correct answer is B: Offering emotional support. In the preoperative phase, a nurse's role includes comforting and reassuring the patient to reduce anxiety and promote emotional well-being. This is crucial for the patient's overall experience and can positively impact their recovery. Obtaining preoperative orders (A) is typically the responsibility of the physician. Explaining the surgical procedure (C) is usually done by the surgeon. Providing informed consent (D) involves ensuring the patient understands the risks and benefits of the procedure, which is typically the responsibility of the healthcare provider performing the procedure.

Correct Answer: A

Rationale: Step 1: Vitamin B12 is absorbed in the small intestine with the help of intrinsic factor produced by parietal cells in the stomach. Step 2: Intrinsic factor binds to vitamin B12, forming a complex that is then absorbed in the ileum. Step 3: If intrinsic factor is lacking (as seen in pernicious anemia), vitamin B12 absorption is impaired, leading to megaloblastic anemia. Step 4: Administering cyanocobalamin bypasses the need for intrinsic factor. Step 5: Thus, intrinsic factor influences Vitamin B12 absorption. Other choices (B, C, D) do not play a direct role in Vitamin B12 absorption.

Correct Answer: E

Rationale: The correct answer is not provided in the choices. However, if I were to choose from the given options, the most appropriate would be C: "Because they are prone to reduced renal efficiency." This is important because older adults may have decreased kidney function, leading to potential complications with IV therapy. Option A is incorrect as defense mechanisms are not directly related to monitoring IV therapy. Option B is incorrect as fluid overload is a general concern with IV therapy regardless of age. Option D is irrelevant to the need for monitoring IV therapy in older adults.

Correct Answer: C

Rationale: The correct answer is C: Taking a walk outside. Patients with lymphoma have weakened immune systems, making them more susceptible to infections. Walking outside exposes them to various environmental pathogens, increasing the risk of infection. Going to church (A) and cleaning the house (B) can be done in controlled environments, while watching television (D) does not involve exposure to external pathogens like going for a walk outside does. Therefore, taking a walk outside poses the highest risk for infection among the given activities.

Correct Answer: B

Rationale: The correct answer is B: Chlamydia collection kit. The primary care provider will need the collection kit to gather a sample for testing. A Chlamydia slide (A) is not necessary as the provider needs to collect a sample first. A Chlamydia swab (C) is used to collect the sample, not to provide to the provider. A Chlamydia wet mount (D) is not appropriate for Chlamydia testing, as it is typically used for other types of infections.