A nurse is reinforcing teaching with a new mother about facility security measures. Which of the following statements by the mother indicates an understanding of the teaching?

Regular physical exercise has been shown to promote better sleep. Engaging in daily exercise can help regulate the sleep-wake cycle, promote relaxation, reduce anxiety and stress, and increase overall sleep quality. It is important to note that exercise should ideally be done earlier in the day, at least a few hours before bedtime, as exercising too close to bedtime may actually have a stimulating effect and make it harder to fall asleep.

The other options listed are not the most appropriate recommendations for addressing difficulty in falling asleep:

1. "Sleep longer hours on the weekend." This suggestion may disrupt the client's sleep routine and can lead to inconsistent sleep patterns throughout the week, potentially making it more challenging to fall asleep on subsequent nights.
2. "Keep the television volume low while you are trying to fall asleep." It is generally recommended to create a sleep-friendly environment, which includes reducing external stimuli like noise, light, and electronic devices in the bedroom. However, watching television right before bedtime can interfere with sleep as the bright light and stimulating content can keep the mind awake.
3. "Remain in bed until you fall asleep." This recommendation may contribute to increased frustration and anxiety if the client is unable to fall asleep quickly. It is generally advised to practice good sleep hygiene, which includes getting out of bed if unable to fall asleep after a reasonable amount of time and engaging in a relaxing activity until feeling sleepy again.

Hyperkalemia refers to an elevated level of potassium in the blood. It can have various manifestations, and one of the critical effects of hyperkalemia is its impact on cardiac function. High levels of potassium can disrupt the normal electrical conduction in the heart, leading to arrhythmias or irregular heart rate. These arrhythmias can range from mild palpitations to more severe and life-threatening conditions like ventricular fibrillation.

Dry mucous membranes are more commonly associated with dehydration or reduced fluid intake. Hyperkalemia does not directly cause dry mucous membranes.

Trousseau's sign is a clinical manifestation of hypocalcemia, not hyperkalemia. It is characterized by carpal spasm induced by inflating a blood pressure cuff above the client's systolic blood pressure for a few minutes.

Hyperactive reflexes are commonly seen in conditions such as hyperthyroidism or certain neurologic disorders. They are not directly related to hyperkalemia.