![]() ![]() (A II) water intoxication a state in which excessive body water causes cells to swell dangerously Water intoxication is a state in which excessive body water causes cells to swell. Angiotensin II Stimulates secretion of aldosterone. Thirst center in hypothalamus Center that stimulates desire to drink fluids. ![]() This *hormone, also known as vasopressin, is produced by neurosecretory cells that extend from the hypothalamus to the posterior pituitary. natriuresis elevated urinary excretion of Na+ (and Cl−) followed by water excretion, which naturally decreases blood volume antidiuretic hormone (ADH) major hormone that regulates water loss. atrial natriuretic peptide (ANP) Promotes natriuresis, elevated urinary excretion of Na+ (and Cl−), accompanied by water.ĪNP increases loss of water in urine. The three most important hormones that regulate the extent of renal Na+ and Cl− reabsorption are: angiotensin II, aldosterone, and atrial natriuretic peptide (ANP) aldosterone By promoting urinary reabsorption of Na+ and Cl−, increases water reabsorption via osmosis.Īldosterone reduces loss of water in urine. Because of the increased blood pressure, more fluid filters out of capillaries and accumulates in the interstitial fluid, causing *edema. How does hyperaldosteronism (excessive aldosterone secretion) cause edema? An elevated aldosterone level promotes abnormally high renal reabsorption of NaCl and water, which expands blood volume and increases blood pressure. The three main hormones that regulate renal Na+ and Cl− reabsorption (and thus the amount lost in the urine) are angiotensin II, aldosterone, and atrial natriuretic peptide. ![]() dehydration When water loss is greater than water gain - a decrease in volume and an increase in osmolarity of body fluids Dehydration occurs when water loss is greater than water gain.ĭoes regulation of these pathways occur via negative or positive feedback? Why? Negative feedback is in operation because the result (an increase in fluid intake) is opposite to the initiating stimulus (dehydration). How does each of the following affect fluid balance: Hyperventilation? Vomiting? Fever? Diuretics? Hyperventilation, vomiting, fever, and diuretics all increase fluid loss. Electrolytes inorganic compounds that dissociate into ions metabolic water water produced in the body mainly when electrons are accepted by oxygen during aerobic respiration Normally, daily water loss equals daily water gain. ![]()
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