The nurse recognizes that which statement regarding sleep is true?

D. As individuals age, there is a natural decline in the amount of deep sleep (slow-wave sleep or Stage N3 sleep) they experience. Older adults tend to spend less time in deep sleep and may experience more fragmented sleep patterns, with more frequent awakenings during the night. This reduction in deep sleep is a normal part of the aging process and is associated with changes in sleep architecture and physiology.
A. Research indicates that a significant portion of the population does not get enough sleep, with many adults experiencing sleep deprivation due to various factors such as lifestyle, work schedules, and sleep disorders.
B. Teenagers often have a natural tendency to stay up later and have difficulty waking up early due to changes in their circadian rhythm during adolescence. This shift in sleep patterns, known as delayed sleep phase syndrome, can result in later bedtimes and waking times for teenagers.

C. Sleep needs typically change over the course of a person's lifetime. Infants and young children require more sleep than adults, with sleep duration gradually decreasing as individuals age.
Additionally, factors such as lifestyle, health status, and environmental influences can affect sleep needs at different stages of life.

A. In respiratory alkalosis, the pH is elevated (alkalotic), the PaCO2 (partial pressure of carbon dioxide) is decreased (hypocapnia), and the HCO3 (bicarbonate) level may be within normal limits or slightly decreased due to compensatory mechanisms. In this option, the pH is elevated (7.54), the PaCO2 is decreased (25), and the HCO3 level is within normal limits (24). These findings support respiratory alkalosis.
B. pH 7.50, PaCO2 40, HCO3 28: In this option, the pH is elevated (7.50), the PaCO2 is within normal limits (40), and the HCO3 level is elevated (28). These findings are not consistent with respiratory alkalosis. Instead, they suggest metabolic alkalosis, where both the pH and bicarbonate levels are elevated.
C. pH 7.35, PaCO2 35, HCO3 22: In this option, the pH is within normal limits (7.35), the PaCO2 is within normal limits (35), and the HCO3 level is within normal limits (22). These findings are not consistent with respiratory alkalosis.
D. pH 7.32. PaCO2 48, HCO3 24: In respiratory alkalosis, the pH is elevated (alkalotic), the PaCO2 is decreased (hypocapnia), and the HCO3 level may be within normal limits or slightly decreased due to compensatory mechanisms. In this option, the pH is within normal limits (7.32), the PaCO2 is elevated (48), and the HCO3 level is within normal limits (24). These findings are not consistent with respiratory alkalosis.