Final answer:
Ivana is likely to experience negative consequences due to her reduced amount of sleep, such as depression-like symptoms, obesity, increased blood pressure, increased stress hormone levels, and reduced immune functioning.
Step-by-step explanation:
Ivana is most likely to experience negative consequences due to her reduced amount of sleep. Sleep deprivation can lead to various issues such as depression-like symptoms, obesity, increased blood pressure, increased stress hormone levels, and reduced immune functioning. Additionally, cognitive and motor function can be significantly affected by sleep deprivation, with research suggesting that it can impair these functions as much as alcohol intoxication. The most severe effects of sleep deprivation occur when a person stays awake for more than 24 hours or has fewer than four hours of sleep over consecutive nights.