Which of the following hormones retains sodium in the body?

Correct Answer: B

Rationale: The correct answer is B: Aldosterone. Aldosterone is a hormone produced by the adrenal glands that helps regulate sodium and water balance in the body. It acts on the kidneys to increase reabsorption of sodium, leading to water retention and increased blood volume. This helps maintain blood pressure and electrolyte balance. A: Antidiuretic hormone (ADH) mainly acts on the kidneys to increase water reabsorption, not sodium retention. C: Thyroid hormone does not directly influence sodium retention. D: Insulin regulates blood sugar levels by promoting glucose uptake, it does not have a direct role in sodium retention.

Correct Answer: C

Rationale: The correct answer is C: Airway obstruction. Postoperatively, a nurse must assess for airway patency in a client with a nasal fracture to ensure proper breathing. Any swelling or bleeding in the nasal area can lead to airway obstruction, which is a critical concern that needs immediate intervention. Choices A, B, and D are incorrect because an allergic reaction, extreme sense of smell, and stridor are not typically associated with postoperative assessment of a nasal fracture. It is crucial to prioritize airway assessment to prevent any complications related to breathing difficulties in this situation.

Correct Answer: D

Rationale: The correct answer is D: Emphasize the completion of the entire course of drug therapy. Empyema is a serious condition that requires antibiotic treatment. Emphasizing the completion of the entire course of drug therapy is crucial to ensure that the infection is completely eradicated and to prevent the development of drug-resistant strains. Teaching breathing exercises (choice A) may help improve lung function but is not the primary intervention for empyema. Offering assurance that empyema takes less time to resolve (choice B) is incorrect as it can mislead the client about the seriousness of the condition. Recommending a balanced but light diet (choice C) may be beneficial for overall health but is not directly related to treating empyema.

Correct Answer: D

Rationale: The correct answer is D: Maturates T cells. The thymus gland is crucial for the maturation of T cells, a type of white blood cell that plays a central role in the adaptive immune response. T cells mature in the thymus through a process of selection and education, where they learn to distinguish self from non-self antigens. This process is essential for the development of a functional immune system. Choices A, B, and C are incorrect because the thymus gland does not play a role in the maturation of B cells, platelets, or red blood cells, respectively.

Correct Answer: B

Rationale: The correct answer is B: Re-exposure to a specific antigen. Memory cells are formed after initial exposure to an antigen. Upon re-exposure to the same antigen, memory cells quickly recognize and respond, converting into plasma cells to produce antibodies. This process is known as secondary immune response. Incorrect choices: A: An organ transplant - Organ transplant does not involve the conversion of memory cells to plasma cells. C: Release of lymphokines - Lymphokines are signaling molecules secreted by immune cells but do not directly cause memory cells to convert to plasma cells. D: Initial exposure to an antigen - Initial exposure to an antigen leads to the formation of memory cells, not their conversion to plasma cells upon re-exposure.