Certified Nephrology Nurse Certification (CNN) Practice Exam

A decreased body temperature is not typically associated with hypovolemia. Instead, hypovolemia, which refers to a state of decreased blood volume, often triggers compensatory mechanisms aimed at maintaining core temperature and physiological function. When the body is in a state of hypovolemia, the heart rate may increase (tachycardia), and vasoconstriction may occur, leading to a potential increase in body temperature or maintenance of normal temperature in response to stress.

In contrast, signs such as sunken eyeballs, dry mucous membranes, and tachycardia are classic indicators of hypovolemia. Sunken eyeballs occur due to fluid loss and dehydration, while dry mucous membranes reflect a lack of adequate hydration in the body. Tachycardia arises as the heart works harder to maintain cardiac output in the context of reduced blood volume. Each of these signs provides vital clues to clinicians to assess hydration status and overall fluid balance in patients.