What is homeostasis?

What is homeostasis?

• A. A population is neither increasing or decreasing
• B. A constant internal environment
• C. The movement of material through the digestive system
• D. The ability to walk erect on two feet

Answer: (B)

Homeostasis is the body's ability to keep its internal conditions stable, such as temperature, pH, and fluid balance, even when external conditions change. This stability is achieved through regulatory systems that sense deviations and trigger responses to bring things back toward the normal range. It’s not a perfectly unchanging state, but a dynamic balance kept within narrow limits by feedback mechanisms. The idea captured here is that the internal environment remains constant enough to function well, despite the outside world. The other options describe things like population changes, digestion, or the ability to walk upright, which don’t pertain to maintaining internal stability.

Homeostasis is the body's ability to keep its internal conditions stable, such as temperature, pH, and fluid balance, even when external conditions change. This stability is achieved through regulatory systems that sense deviations and trigger responses to bring things back toward the normal range. It’s not a perfectly unchanging state, but a dynamic balance kept within narrow limits by feedback mechanisms. The idea captured here is that the internal environment remains constant enough to function well, despite the outside world. The other options describe things like population changes, digestion, or the ability to walk upright, which don’t pertain to maintaining internal stability.