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