Bodily systems show a remarkable capacity for maintaining a steady state of equilibrium, even as these systems perform their functions and are exposed to widely differing and stressful environmental conditions. The term that describes the body’s tendency to maintain a steady state is:

The term that describes the body's tendency to maintain a steady state is "homeostasis." Homeostasis is a fundamental principle that indicates the body’s ability to regulate its internal environment to ensure stability in response to fluctuations in external or internal conditions. It involves various physiological processes that balance the body's pH, temperature, hydration levels, and other vital conditions.

Extra: Homeostasis is essential for the survival of organisms, particularly complex multicellular organisms like humans. It relies on feedback systems that involve receptors, control centers (usually in the brain), and effectors (such as organs, glands, and muscles) that respond to changes.

For instance, thermoregulation is an example of homeostasis, where the body maintains a stable internal temperature. If the body’s temperature rises, the hypothalamus in the brain detects this deviation and activates mechanisms such as sweating and vasodilation (widening of blood vessels) to dissipate heat. Conversely, if the body temperature drops, the hypothalamus initiates shivering and vasoconstriction (narrowing of blood vessels) to generate and conserve heat.

Other examples of homeostatic processes include the regulation of blood sugar levels by insulin and glucagon, the maintenance of blood pressure, and the regulation of fluid balance by antidiuretic hormone (ADH). Homeostatic imbalances can lead to diseases or disorders, so maintaining homeostasis is crucial for health and wellbeing.