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Related Concept Videos

Regulation of Water Intake01:25

Regulation of Water Intake

Osmolality refers to the number of solute particles per kilogram of solvent in a solution. Plasma osmolality specifically indicates the total number of solute particles per kilogram of water in blood plasma. This value reflects the body's hydration status and is tightly regulated through mechanisms controlling water intake and output. While water consumption is a conscious decision, the body has intrinsic regulatory systems to maintain fluid balance. Dehydration, a state of water deficit...
Primary Motives: Hunger and Thirst01:25

Primary Motives: Hunger and Thirst

Hunger and thirst are fundamental physiological drives crucial for maintaining homeostasis and ensuring the survival of both humans and animals. These drives are regulated through complex interactions between the brain, hormones, and sensory receptors.
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Thermoregulation01:26

Thermoregulation

The human body has a sophisticated thermoregulation system that employs negative feedback mechanisms to maintain an optimal core temperature. When the core temperature drops, peripheral and central thermoreceptors send signals to the hypothalamus, activating the heat-promoting center. This center triggers several responses aimed at increasing the core temperature. First, vasoconstriction reduces the flow of warm blood from internal organs to the skin so that the heat is not lost from the skin,...
What Are Osmoregulation and Excretion?02:12

What Are Osmoregulation and Excretion?

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Regulation of Water Output01:26

Regulation of Water Output

The human body predominantly expels water through the urinary system. On average, an individual generates around 1.5 liters of urine each day. This amount can fluctuate based on how well a person is hydrated, but a critical minimum quantity of urine must be produced to ensure the body's proper functioning. Daily, the kidneys remove 600 to 1200 milliosmoles of dissolved substances, effectively excreting excess minerals and water-soluble toxins such as creatinine, urea, and uric acid from the...
Diabetes Insipidus II: Pathophysiology01:22

Diabetes Insipidus II: Pathophysiology

Normally, water balance is maintained through three interconnected mechanisms: the hypothalamic thirst center, the synthesis and release of antidiuretic hormone (ADH, or vasopressin), and the kidneys' responsiveness to this hormone. ADH is synthesized in the hypothalamus, released from the posterior pituitary, and acts on the distal nephron, allowing water reabsorption and concentrated urine production.Diabetes Insipidus and Its TypesIn diabetes insipidus (DI), this regulatory system is...

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Related Experiment Video

Updated: Jul 14, 2026

Determining Basal Energy Expenditure and the Capacity of Thermogenic Adipocytes to Expend Energy in Obese Mice
06:57

Determining Basal Energy Expenditure and the Capacity of Thermogenic Adipocytes to Expend Energy in Obese Mice

Published on: November 11, 2021

Water drinking induces thermogenesis through osmosensitive mechanisms.

Michael Boschmann1, Jochen Steiniger, Gabriele Franke

  • 1Franz Volhard Clinical Research Center and Helios-Klinikum-Berlin, Charité Campus Buch, Universitary Medicine Berlin, Wiltbergstrasse 50, Hs. 129, D-13125 Berlin, Germany.

The Journal of Clinical Endocrinology and Metabolism
|May 24, 2007
PubMed
Summary

Drinking 500 ml of water significantly boosts energy expenditure by 24% in overweight individuals. This thermogenic effect is specific to water volume and not due to gastric distension, suggesting a novel osmoreceptor mechanism.

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Last Updated: Jul 14, 2026

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06:57

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Published on: November 11, 2021

Measuring Skeletal Muscle Thermogenesis in Mice and Rats
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Using a Combination of Indirect Calorimetry, Infrared Thermography, and Blood Glucose Levels to Measure Brown Adipose Tissue Thermogenesis in Humans
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Published on: June 2, 2023

Area of Science:

  • Physiology
  • Metabolism

Background:

  • Previous research demonstrated that 500 ml of water intake stimulates thermogenesis in normal-weight individuals.
  • This study investigates the thermogenic response to water in overweight or obese subjects.

Purpose of the Study:

  • To determine if drinking 500 ml of water induces thermogenesis in overweight or obese individuals.
  • To compare the thermogenic effects of 500 ml water, 500 ml isoosmotic saline, and 50 ml water.

Main Methods:

  • A randomized, controlled, crossover trial was conducted.
  • Participants included eight men and eight women who were overweight or obese.
  • Energy expenditure, heart rate, and blood pressure were measured after fluid ingestion.

Main Results:

  • Ingesting 500 ml of water led to a 24% increase in energy expenditure over 60 minutes.
  • Neither 500 ml of isoosmotic saline nor 50 ml of water affected energy expenditure.
  • No significant changes in heart rate or blood pressure were observed.

Conclusions:

  • The thermogenic response to water is not mediated by fluid volume or gastric distension.
  • A portal osmoreceptor, potentially an ion channel, is hypothesized to be involved in water-induced thermogenesis.