Correct Answer: A

Rationale: The nurse should address the inadequate food supply first as it directly impacts the client's health post-discharge. Proper nutrition is crucial for recovery after surgery, especially such as coronary artery bypass grafting. While low pain tolerance, limited social support, and decreased self-esteem are all important issues to address, addressing the client's nutritional needs is the priority in this scenario to ensure optimal recovery and healing.

Correct Answer: B

Rationale: The correct answer is to initiate cardiac monitoring. Severe hypokalemia can lead to life-threatening arrhythmias, making cardiac monitoring the priority to detect and manage any cardiac complications. Starting oxygen, seizure precautions, or bed rest are not the immediate priority actions for severe hypokalemia.

Correct Answer: B

Rationale: The correct answer is B: 'Coordinating patient care with other team members.' In a multidisciplinary healthcare team, nurses collaborate with other healthcare professionals to ensure comprehensive care for patients. Working independently without consulting others (choice A) is not aligned with the collaborative nature of multidisciplinary teams. Ignoring patient concerns (choice C) goes against the core principles of patient-centered care. Making all healthcare decisions alone (choice D) contradicts the teamwork approach of a multidisciplinary team.

Correct Answer: D

Rationale: Orthostatic hypotension and flat neck veins are classic manifestations of fluid volume deficit. When the body loses fluid, blood volume decreases, leading to decreased venous return to the heart, resulting in orthostatic hypotension and flat neck veins. Choices A, B, and C are more indicative of other conditions such as dehydration, respiratory issues, or compensatory mechanisms in response to hypovolemia, respectively.

Correct Answer: D

Rationale: Insulin forces potassium out of the plasma and into the cells, which can cause hypokalemia. This is because insulin enhances the activity of the sodium-potassium pump in cell membranes, promoting the movement of potassium from the extracellular fluid into the cells. Choices A, B, and C are incorrect as insulin does not directly influence the movement of calcium, magnesium, or phosphorus in the same manner as it does with potassium.