Which of the following is a manifestation of hypokalemia?

Hypokalemia, which is a condition characterized by low levels of potassium in the blood, can lead to a variety of symptoms and manifestations. One key manifestation is gastrointestinal disturbance, which includes nausea and vomiting. When potassium levels drop, it can affect the muscle contractions in the gastrointestinal tract, leading to nausea and potentially vomiting as a result of decreased muscle function. This aligns with the body's response to potassium imbalance, as extended hypokalemia can impact the normal functioning of muscles, including those in the digestive system.

In contrast, weight gain, frequent urination, and increased appetite are not direct manifestations typically associated with hypokalemia. Weight gain may indicate fluid retention or other metabolic changes but is not a hallmark sign of low potassium. Frequent urination might instead be related to hyperkalemia (high potassium) or other factors rather than hypokalemia, and increased appetite is generally not a symptom linked to low potassium levels. Understanding these relationships helps to identify the manifestations of hypokalemia accurately, emphasizing the impact of potassium on muscle and digestive system functions.