Homeostasis can best be described as the body’s
Multiple Choice
ability to maintain constant internal conditions.
need to slow things down to a more relaxed state.
need to speed things up to a more energized state.
ability to avoid responding to external stimuli.
The correct answer and explanation is:
The correct answer is:
ability to maintain constant internal conditions.
Explanation:
Homeostasis refers to the body’s ability to maintain a stable internal environment despite changes in external conditions. This concept is crucial for the proper functioning of cells, tissues, and organs. The term is derived from the Greek words homeo, meaning “similar,” and stasis, meaning “standing still” or “balance.” Therefore, homeostasis is the process through which the body keeps various physiological parameters within a narrow, optimal range, such as temperature, pH levels, and fluid balance, ensuring that cells can perform their essential functions effectively.
One of the most well-known examples of homeostasis is the regulation of body temperature. The human body maintains a relatively constant temperature of around 37°C (98.6°F). When the temperature deviates from this range, mechanisms such as sweating, shivering, or altering blood flow are activated to bring the temperature back to its normal level. This dynamic process of balancing and adjusting internal conditions is essential for survival.
Homeostasis involves multiple systems working together, including the nervous and endocrine systems. For instance, when blood glucose levels rise after eating, the pancreas releases insulin to help cells absorb the excess glucose, bringing the levels back down to normal. Conversely, when glucose levels fall too low, glucagon is released to signal the liver to release stored glucose.
In addition to temperature and glucose regulation, homeostasis controls factors like blood pressure, fluid balance, and electrolyte levels. Disruptions to homeostasis can lead to conditions like dehydration, diabetes, or hypothermia. Thus, maintaining homeostasis is vital for health and well-being, allowing the body to adapt to both internal and external challenges and continue functioning efficiently.