Nutrition Module 8 Key Terms

Water inside body cells making up most of body water

Intracellular fluid (ICF)

Water outside cells including blood and interstitial fluid

Extracellular fluid (ECF)

Movement of water across a membrane toward higher solute concentration

Osmosis

Major positively charged ion inside cells

Potassium

Major positively charged ion outside cells

Sodium

Hormone that reduces urine output and conserves water

ADH (Antidiuretic Hormone)

Hormone that increases sodium and water reabsorption

Aldosterone

Process where water balance is maintained in the body

Fluid balance

Condition where a cell swells due to water entering

Hypotonic solution

Condition where a cell shrinks due to water leaving

Hypertonic solution

Body function of transporting nutrients and wastes

Water function

Regulation of body temperature through sweating

Water function

Substance lost in sweat that helps maintain fluid balance

Electrolytes

Indicator of hydration status based on color

Urine color

Loss of body water leading to imbalance

Dehydration