Water

antidiuretic hormone

- ADH - hormone secreted from pituitary glands in response to dehydration; stimulates kidneys to conserve water

hyponatremia

- low blood sodium - excess water dilutes the sodium concentration of blood, disrupting water balance

metabolic water.

Cells also form some water as a by-product of metabolism; this source is termed metabolic water.

Dehydration

body water depletion

water intoxication

condition that occurs when too much water is consumed in a short time period or kidneys have difficulty filtering water from blood

Water

does not need to be digested - your body obtains water from beverages and foods, especially fruits, vegetables, and meats. The body makes some water as a result of metabolism. - body is 50-75% water - lean muscle contains more water, fat contains less - babies have more, old people less - is a major solvent for substances like glucose - Water helps transport water-soluble substances within and outside cells. The Adequate Intake (AI) for total water intake is approximately 11 cups (2.7 L) for young women and approximately 15.5 cups (3.7 L) for young men

aldosterone

hormone secreted from adrenal glands in response to dehydration; stimulates kidneys to conserve sodium and water

Water membrane transport

simple diffusion - molecular movement from a region of higher to lower concentration selectively permeable membrane - barrier that allows the passage of certain substances and prevents the movement of other substances osmosis - movement of a solvent, usually water, through a selectively permeable membrane The body maintains the balance of compartmental fluids primarily by controlling concentrations of ions in each compartment. Ions are mineral elements or small molecules that have electrical charges, such as sodium, potassium, phosphate, and chloride ions. These ions are also called electrolytes.

oral rehydration therapy

specially prepared solutions of water and electrolytes used to prevent and treat dehydration

diuretic

substance that increases urine production

Hydration

term for the bodies water status

intracellular water

water that is inside cells - About two-thirds of the body's water is in the intracellular compartment.

extracellular water

water that surrounds cells or is in the fluid portion of blood