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Sodium (Na+)
Potassium (K+)
Chloride (Cl-)
Bicarbonate (HCO3-)
Hydrogen (H+)
Calcium (Ca2+)
Magnesium (Mg2+)
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∙ 9y ago
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Aldosterone is a hormone that causes the renal tubules to reclaim sodium ions from the filtrate?
true
What is the function of the transverse tubules in muscle activation?
What is the function of the transverse tubules, is it the place where actin and myosin interact or the storage of calcium ions, or to transmit muscle impulses into the cell interior?
What is the function of the renal portal system?
The wastes and surplus ions in the venous blood from caudal region of fish are respectively eliminated and absorbed in the kidney tubules. This lowers the osmotic pressure of the extracellular fluid that in turn reduces the osmotic intake of water into the body, thereby playing an important role in osmoregulation in Pisces.
Do ions need a transport protein to enter bilayer?
Yes! K+ or Na+ or exchanged with its specific potassium and sodium pump protein on the membrane.
What reagent is used to separate Na and Mg2?
Na+ and Mg2+ can be separated by adding CO32- ions to the solution, forming MgCO3 precipitate which can be filtered off.
The proximal convoluted tubules reabsorb what percentage of filtered water?
The largest amount of solute and water reabsorption from filtered fluid occurs in the proximal convoluted tubules, which reabsorb 65% of the filtered water, Na+, and K+; 100% of most filtered organic solutes such as glucose and amino acids; 50% of the filtered Cl-; 80-90% of the filtered HCO3-; 50% of the filtered urea; and a variable amount of the filtered Ca2+, Mg2+, and HPO42- (phosphate). In addition, proximal convoluted tubules secrete a variable amount of H+ ions, ammonium ions (NH4+), and urea. So your answer is 65%
What hormone promotes the reabsorbtion of sodium and potassium ions by the kidney?
When the macula densa in the distal tubules of the kidney sense a decrease in fluid volume, the renin-aldosterone system is activated. Aldosterone is the hormone responsible for sodium retention, causing water to be conserved.
Which ions are exchanged in a sodium potassium pump?
3 sodium ions for 2 potassium ions.
Why sodium level decrease in diebetic patient?
i think this is because of sodium and glucose transporter the transmembrane protein allow sodium ions and glucose to enter the cell together in the same direction and its used to actively transport glucose out of the intestine and out of the kidney tubules back to blood so in case of diabetes sodium cant be reabsorbed in kidney tubules and go to urine and thus sodium level decrease in diabetic patient
What is the role of the tubules?
What is the function of the transverse tubules, is it the place where actin and myosin interact or the storage of calcium ions, or to transmit muscle impulses into the cell interior?
What process in the circulatory system that transport excess water from the body to the kidney?
Basically osmosis. ALL your body water is in equilibrium, there's no way to move a specific batch of water anywhere, BUT the kidney can move both sodium and potassium (independently) ions across cell membranes (proximal and distal tubules respectfully). Since water will follow the ions (if allowed : yes for proximal, no for distal tubules), then water can be indirectly controlled by the kidneys. Since a fifth of the cardiac output goes through the kidneys, excess water can be removed quickly (about a liter per hour).
Aldosterone is a hormone that causes the renal tubules to reclaim sodium ions from the filtrate?
true
What period is characterized by calcium ions release into cytosol and depolarization of the sarcolemma and T tubules?
The period that would be characterized by those things would be muscle contraction. Calcium ions are the neurotransmitters that cause contraction. Calcium Ions depolarize the cell and are spread through out the muscle via the T tubules.
What part of nephron which removes both water ions and nutrients?
Covoluted part of Proximal tubules.
What are calcium ions stores as in muscle cells?
sarcoplasmic reticulum, i think. either that are T tubules
Does ADH promote secretion of sodium ions?
No! it doesn't. It just promotes your free water reabsorption in the distal tubules of the kidney. It increases the amount of aquaporines in the cell membrane, causing an influx of water in the medulla of the kidney. Sodium concentration of the urine will be higher because the urine is more concentrated. However, there isn't more sodium excreted.
What hormone from the adrenal cortex will cause the distal convoluted tubules to reabsorb more sodium ions?
adh
