Correct Answer: A

Rationale: The correct answer is A: Hyponatremia. Lithium can affect sodium levels in the body, potentially leading to hyponatremia, which is a condition characterized by low sodium levels. This imbalance requires close monitoring as it can lead to symptoms such as confusion, weakness, and even seizures. Choices B, C, and D are incorrect because lithium is not primarily associated with causing hypokalemia, hypercalcemia, or hypernatremia. While these imbalances can occur in certain conditions or with other medications, the main electrolyte imbalance to monitor when a client is prescribed lithium is hyponatremia.

Correct Answer: B

Rationale: Engaging in regular physical activity is crucial for individuals with hypertension as it helps lower blood pressure and improve cardiovascular health. Physical activity is known to have a significant impact on reducing hypertension and overall cardiovascular risk. Choice A, increasing sodium intake, is incorrect as reducing sodium is typically recommended for hypertension to help lower blood pressure. Choice C, avoiding foods high in fat, is beneficial for overall health but not the most crucial recommendation for hypertension management. Choice D, limiting fluid intake to 1 liter per day, is not a standard recommendation for hypertension unless advised by a healthcare provider for specific cases. Therefore, the most important recommendation for the client with hypertension is to engage in regular physical activity.

Correct Answer: A

Rationale: The Moro reflex is an instinctive response observed in newborns, indicating their neurological integrity. This reflex is evaluated by eliciting a startle response in the infant, involving the sudden extension and abduction of the limbs, followed by their retraction. This assessment helps in determining the proper functioning of the infant's nervous system and brain. Choices B, C, and D are incorrect as they do not relate to the evaluation of the Moro reflex. Renal functioning pertains to kidney function, thermoregulation refers to temperature control, and respiratory adequacy involves assessing breathing and oxygenation levels, none of which are evaluated through the Moro reflex.

Correct Answer: C

Rationale: Chills and back pain are signs of a possible transfusion reaction, which can indicate severe complications like a hemolytic reaction or sepsis. The priority action for the nurse is to stop the transfusion immediately to prevent further harm to the client. Slowing the rate of the transfusion or administering an antipyretic will not address the underlying cause of the reaction and could potentially worsen the client's condition. Notifying the healthcare provider should be done after ensuring the client's immediate safety by stopping the transfusion.

Correct Answer: A

Rationale: The correct answer is to encourage the client to ambulate. Early ambulation helps alleviate gas pain and bloating by promoting gastrointestinal motility and reducing the accumulation of gas in the abdomen. Applying a heating pad may provide comfort for some types of pain but is not specifically effective for gas pain. Providing a carbonated beverage can actually worsen gas pain due to the introduction of more gas into the digestive system. Teaching relaxation techniques may be beneficial for overall comfort but may not directly address the gas pain and bloating experienced post-cesarean section.