Anatomy and Physiology II Practice Test 2025 - Free Anatomy Practice Questions and Study Guide

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What is the chief mechanism the body uses to maintain fluid balance?

Fluid intake

Fluid output

The chief mechanism the body uses to maintain fluid balance primarily revolves around fluid output, which includes processes such as urination, perspiration, respiration, and gastrointestinal loss. The kidneys play a crucial role in regulating the amount of water excreted through urine, adjusting it based on the body’s hydration status and hormone signals, such as those from antidiuretic hormone (ADH).

Fluid output is vital for preventing dehydration and ensuring that the body can eliminate waste products effectively. While fluid intake, distribution, and absorption are important processes that contribute to hydration and overall fluid management, they do not directly control the volume of fluids expelled from the body. The careful regulation of fluid output enables the body to maintain homeostasis and respond to varying needs for water intake, environmental conditions, and metabolic activities.

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Fluid distribution

Fluid absorption

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