Water balance is regulated by control of amount(s):
a. Ingested
b. Excreted in urine
c. Lost in perspiration
d. Lost in feces

Verified step by step guidance

Understand that water balance in the body is maintained by regulating the amount of water entering and leaving the body.

Identify the sources of water intake, which primarily include water ingested through drinking and food consumption.

Recognize the routes of water loss, which include excretion in urine, loss through perspiration (sweat), and loss in feces.

Note that the kidneys play a key role in controlling water excretion in urine, adjusting the volume based on the body's hydration status.

Conclude that water balance is regulated by controlling all these amounts: ingested water, urine output, perspiration, and fecal water loss.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Water Intake Regulation

Water intake includes all sources of fluid entering the body, primarily through drinking (ingested water) and to a lesser extent from food and metabolic water. The body regulates thirst to maintain proper hydration and balance fluid levels according to physiological needs.

Renal Excretion of Water

The kidneys control water balance by adjusting urine volume and concentration. Through processes like filtration, reabsorption, and secretion, the kidneys excrete excess water or conserve it, playing a central role in maintaining homeostasis.

Non-Renal Water Loss

Water is also lost through perspiration (sweat) and feces. Perspiration helps regulate body temperature, while fecal water loss is usually minimal but can increase in certain conditions. These routes contribute to overall water balance and must be considered in fluid regulation.

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Textbook Question

Sodium balance is regulated primarily by control of amount(s):

a. Ingested

b. Excreted in urine

c. Lost in perspiration

d. Lost in feces

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