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How would a diuretic affect water reabsorption into the blood?
Saragonzales
A diuretic is a substance that tends to cause diuresis (increased urine flow) by hindering the amount of water reabsorbed back into the blood. the mechanism of how this occurs depends on the type of diuretic. for example some diuretics impede the body's ability to reabsorb Na at the ascending loop of Henle thus not increasing the osmolarity of the extracellular fluid which would in turn cause water reabsorption, so the water remains in the lumen of the nephron and is excreted causing increased urine volume. other diuretics may act on the proximal and distal convoluted tubules causing water retension due to decreased Nacl reabsorption or Na reabsorption or even potassium.
Due to the fact that a diuretic will cause water to lost in the urine, this will cause an increase in osmolarity above the setpoint of 300mOsm/L, therefore more ADH (anti-diuretic hormone) is released into the bloodstream. When ADH reaches the kidney, its main targets are the distal tubules and the collecting ducts. The ADH brings about changes that make the epithelium more permeable to water. the resulting increase in water reabsorption concentrates the urine, reducing urine volume and lowers blood osmolarity back to set point.
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How does sodium reabsorption affect water reabsorption?
If sodium reabsorption increases, water reabsorption increases as well.
What is facultative water reabsorption?
facultative water reabsorption is the reabsorption of water in the kidneys that is under the hormonal control of ADH (anti diuretic hormone) The amount of water reabsorbed is dependant on how much the body needs to reabsorb to maintain homeostasis and fluid balance.
When blood pressure decrease to promote the reabsorption of water is?
the renal hormonesecreted by the hypothalmus when blood pressure decrease to promote the reabsorption of water is
When the kidneys return salts and water to the blood it is called?
Reabsorption via a process called "secretion".
Is coffee an antidiuretic?
Coffee is a diuretic. It decreases the reabsorption of water at the proximal convoluted tubule in the nephrons in the kidney. This makes there more water present in the urine.
What is the function of vasopressin in the human body?
Vasopressin( Anti-diuretic hormone) is a naturally occurring hormone in the body that is secreted by the posterior lobe of the pituitary gland. It constricts blood vessels, raises blood pressure, stimulates water reabsorption, and reduces excretion of urine.
How does the reabsorption of sodium and water from the renal tubules increase blood volume?
When blood volume is low, sodium reabsorption in the kidneys is stimulated. The increased sodium increases osmotic pressure, causing water to be reabsorbed with the sodium. The reabsorbed water is added to the plasma, thus increasing blood volume.
When water moves from a nephron in the kidney back to the blood it is called?
Reabsorption
What decreases water loss by increasing reabsorption of water into blood and decreasing urine production?
ADH
Explain how antidiuretic hormone can help regulate hypotension Be specific?
it can help by increasing reabsorption of water by the kidney. With the reabsorption, blood plasma volume increases, thus raising blood pressure
What is the difference between filtration and reabsorbtion?
Filtration Filtration is accomplished by the movement of fluids from the blood into the bowmans capsule. = Reabsorption = = Reabsorption involves the selective transfer of essential solutes and = water back into the blood.
How does angiotension 2 affect kidney?
Angiotensin II affects the kidney in various ways: 1) it stimulates the secretion of aldosterone from the adrenal cortex which causes the tubules of the kidneys to increase reabsorption of sodium(Na) and water into the blood increasing the volume of fluid in the body. This can be very useful in cases of hypovolemia(low blood volume). 2) it acts as a vasoconstrictor, thereby increasing test and blood pressure. 3) it stimulates the secretion of anti-diuretic hormone, also called vasopressin which stimulates the reabsorption of water in the kidneys and also acts as a vasoconstrictor. 4)it increases renal hypertrophy in renal tubule cell leading to an increase in Na intake.
