What is the equilibrium maintained by healthy living organisms called?

• A. Homogeneous
• B. Heterogeneous
• C. Homeostasis
• D. Mitosis

Answer: (C)

Maintaining stable internal conditions despite external changes is called homeostasis. Living organisms constantly monitor variables like temperature, pH, glucose, and fluid balance, using feedback mechanisms to keep them within narrow ranges. For example, when body temperature rises, sweating and blood vessel dilation help cool the body; when it drops, shivering and constriction of vessels help conserve heat. This is a dynamic, self-regulating process that keeps the body's environment suitable for its cells and enzymes. The other terms don’t describe this regulatory balance: homogeneous and heterogeneous refer to how substances are mixed or distributed, while mitosis is the process of cell division.