PLTW Biomedical Science Practice Test 2025 - Free Biomedical Science Practice Questions and Study Guide

Question: 1 / 400

What does the term homeostasis refer to in biology?

The study of body structures

The ability of the body to maintain a stable internal environment

Homeostasis refers specifically to the ability of the body to maintain a stable internal environment despite external changes. This concept is vital in biology as it encompasses various physiological processes that regulate factors like temperature, pH, hydration, and electrolyte balance. For instance, when the body's temperature rises due to exercise or environmental heat, physiological mechanisms such as sweating are activated to cool the body down. Conversely, if the body becomes too cold, shivering can create warmth.

Maintaining homeostasis is crucial for the survival of organisms, as imbalances can lead to dysfunction and disease. Therefore, understanding homeostasis provides insights into how biological systems operate, adapt, and respond to both internal and external stimuli.

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The process of cellular reproduction

The genetic makeup of an organism

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