Which term refers to a normal or balanced state of the body?

• A. Anatomy
• B. Cytology
• C. Homeostasis
• D. Histology

Answer: (C)

The main idea here is the body's ability to maintain a stable internal environment. Homeostasis describes that dynamic balance, keeping things like temperature, pH, and blood glucose within narrow limits even when the outside conditions change. For example, when you’re hot, you sweat and vessels near the skin dilate to release heat; when you’re cold, you shiver and blood vessels constrict to conserve heat. These adjustments involve receptors sensing changes, a control center interpreting them, and effectors acting to restore balance, often through negative feedback that pushes conditions back toward the set point. Anatomy, cytology, and histology are different fields—studies of structure, cells, and tissues—rather than the state of balance the body seeks to maintain.