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Which hormone plays a central role in determining the rate of sodium reabsorption and potassium secretion?
Aldosterone is the hormone that plays a central role in determining the rate of sodium reabsorption and potassium secretion in the kidneys. Aldosterone acts on the distal convoluted tubules and collecting ducts of the kidney to increase sodium reabsorption and potassium secretion.
What stimulates the secretion of potassium from the peritubular blood into the distal convoluted tubule?
Aldosterone
Excess blood potassium hyperkalemia is removed by increasing secretion of the hormone which stimulates an increase in the secretion of potassium by cells within the?
Excess blood potassium (hyperkalemia) is typically removed by increasing the secretion of aldosterone. Aldosterone stimulates the kidneys to increase the secretion of potassium by cells within the kidney nephrons, promoting the excretion of excessive potassium from the body through urine.
What is the purpose of aldosterone?
The major target of aldosterone is the distal tubule of the kidney, where it stimulates exchange of sodium and potassium. Three primary physiologic effects of aldosterone result:Increased resorption of sodium: sodium loss in urine is decreased under aldosterone stimulation.Increased resorption of water, with consequent expansion of extracellular fluid volume. This is an osmotic effect directly related to increased resorption of sodium.Increased renal excretion of potassium.Knowing these effects should quickly suggest the cellular mechanism of action this hormone. Aldosterone stimulates transcription of the gene encoding the sodium-potassium ATPase, leading to increased numbers of "sodium pumps" in the basolateral membranes of tubular epithelial cells. Aldosterone also stimulates expression of a sodium channel which facilitates uptake of sodium from the tubular lumen.
What hormone affect the concentration of k ions?
Aldosterone is a hormone that affects the concentration of potassium ions in the body. It is produced by the adrenal glands and regulates the levels of sodium and potassium in the blood, leading to increased reabsorption of sodium and excretion of potassium by the kidneys.
Aldosterone acts on what part of the kidney?
Aldosterone acts on the distal convoluted tubule and collecting duct in the kidney to increase sodium reabsorption and potassium secretion.
Which hormons used to promote Na reabsorption by kidneys?
aldosterone, antidiuretic hormone (ADH, or vasopressin), atrial natriuretic peptide (ANP), and other hormones.The three hormones responsible for regulating renal sodium and chloride ion reabsorption are;1. Aldosterone2. Atrial natriuretic peptide or ANP3. Angiotensin II
What is the most important factor influencing potassium ion secretion?
The most important factor influencing potassium ion secretion in the kidneys is the hormone aldosterone. Aldosterone promotes the reabsorption of sodium and water in exchange for potassium secretion, helping to regulate potassium levels in the body.
When sodium ions are reabsorbed in response to the action of aldosterone what do potassium ions do?
When sodium ions are reabsorbed in response to aldosterone, potassium ions are often secreted into the urine to maintain electrolyte balance. Aldosterone triggers the reabsorption of sodium in exchange for the secretion of potassium in the distal tubules of the kidney. This mechanism helps to regulate blood pressure and electrolyte balance in the body.
Diuretics that competitively block the aldosterone-induced stimulation of Na reabsorption and K secretion in the distal convoluted tubule are known as?
potassium-sparing diuretics
Aldosterone is secreted by adrenal cortex in response to?
Aldosterone is secreted by the adrenal cortex in response to low blood pressure, low blood volume, or high levels of potassium in the blood. It helps regulate blood pressure and electrolyte balance by increasing sodium reabsorption and potassium excretion in the kidneys.
What two hormones regulate water balance?
Antidiuretic hormone (ADH) and aldosterone are the two hormones that regulate water balance in the body. ADH helps the kidneys retain water by increasing water reabsorption, while aldosterone regulates water and salt balance by promoting sodium reabsorption and potassium excretion in the kidneys.
