Correct Answer: A

Rationale: The correct answer is A because collecting urine 24-48 hrs after the client has received nonradioactive B12 is essential for the Schilling test to evaluate vitamin B12 absorption. Urine is collected to measure the excretion of radioactive B12, which helps in diagnosing pernicious anemia or malabsorption issues. Incorrect choices: B: Collecting blood samples is not necessary for the Schilling test as it primarily involves urine collection. C: Allowing oral fluid consumption is important to prevent dehydration and is not contraindicated after receiving nonradioactive B12. D: Making the client lie down in the supine position is unnecessary for the Schilling test and may not affect the test results.

Correct Answer: C

Rationale: Rationale for Answer C: Antibodies are produced by the B-cells. B-cells are a type of lymphocyte that differentiate into plasma cells, which are responsible for producing antibodies in response to antigens. This process is a key component of the humoral immune response. Therefore, the statement that antibodies are produced by the B-cells is true. Summary of Incorrect Choices: A: Antibody-mediated defense occurs through the B-cell system, not the T-cell system. T-cells are involved in cell-mediated immunity. B: Cellular immunity is mediated by T-cells, not antibodies produced by B-cells. D: Lymphocytes increasing with an allergic response is not directly related to the production of antibodies by B-cells. Allergic responses involve a different mechanism.

Correct Answer: C

Rationale: Rationale: 1. Anemia results in decreased oxygen-carrying capacity, leading to tissue hypoxia. 2. Dyspnea (shortness of breath) occurs due to the body's attempt to increase oxygen intake. 3. Tachycardia (rapid heart rate) compensates for decreased oxygen delivery. 4. Pallor (pale skin) is a classic sign of decreased red blood cells in iron-deficiency anemia. Summary: A: Night sweats, weight loss, and diarrhea are not typical manifestations of iron-deficiency anemia. B: Nausea, vomiting, and anorexia are non-specific symptoms and not specific to iron-deficiency anemia. D: Itching, rash, and jaundice are not commonly associated with iron-deficiency anemia.

Correct Answer: B

Rationale: To calculate the drip rate, we first need to find the total volume of IV fluid to be administered, which is 1500 ml + 1250 ml = 2750 ml. Then, we multiply the total volume by the drop factor (2750 ml * 15 gtt/ml = 41250 gtt). Finally, we divide the total number of drops by the time in minutes (24 hours * 60 min = 1440 min) to get the drip rate: 41250 gtt / 1440 min = 28.47 gtt/min, which rounds up to 29 gtt/min. Therefore, choice B is correct. Choices A, C, and D are incorrect because they do not reflect the accurate calculation based on the given parameters.

Correct Answer: A

Rationale: The correct answer is A because completing a comprehensive database is part of the first phase of the nursing process, which is assessment. During assessment, the nurse gathers data about the patient's health status. This information is crucial for identifying health problems, developing nursing diagnoses, planning interventions, and evaluating outcomes. Choice B is incorrect because identifying nursing diagnoses is part of the second phase, which is diagnosis. Choice C is incorrect as intervening based on priorities of patient care is part of the third phase, which is planning. Choice D is incorrect because determining whether outcomes have been achieved is part of the fourth phase, which is evaluation.