Question: What Is The Primary Function Of The Distal Convoluted Tubule And Collecting Duct?

What are the four main functions of the kidneys?

KIDNEYSRegulation of extracellular fluid volume.

The kidneys work to ensure an adequate quantity of plasma to keep blood flowing to vital organs.Regulation of osmolarity.

Regulation of ion concentrations.

Regulation of pH.

Excretion of wastes and toxins.

Production of hormones..

Does the distal convoluted tubule reabsorb water?

The distal convoluted tubule and collecting ducts are then largely responsible for reabsorbing water as required to produce urine at a concentration that maintains body fluid homeostasis.

What is the primary function of the distal convoluted tubule?

A distal convoluted tubule connects to the collecting duct system that fine-tunes salt and water reabsorption and plays a major role in acid–base balance. The initial segment of the collecting duct, the cortical collecting duct, takes off from the distal convoluted tubule in the cortex.

How is the proximal convoluted tubule different from the distal convoluted tubule quizlet?

The filtrate is produced within the proximal convoluted tubule. How is the proximal convoluted tubule different from the distal convoluted tubule? Water reabsorption is always obligatory in the proximal convoluted tubule but not in the distal convoluted tubule.

Which hormones regulate the amount of water and salt reabsorbed by the distal tubule and collecting duct?

Aldosterone is a steroid hormone. Its main role is to regulate salt and water in the body, thus having an effect on blood pressure.

What is the function of vasa recta?

Vasa Recta Function Not only do the vasa recta bring nutrients and oxygen to the medullary nephron segments but, more importantly, they also remove the water and solute that is continuously added to the medullary interstitium by these nephron segments.

What happens at the distal convoluted tubule?

It regulates pH by absorbing bicarbonate and secreting protons (H+) into the filtrate, or by absorbing protons and secreting bicarbonate into the filtrate. Sodium and potassium levels are controlled by secreting K+ and absorbing Na+. Sodium absorption by the distal tubule is mediated by the hormone aldosterone.

What is the function of collecting duct quizlet?

Collecting ducts are the last opportunity to resorb H2O and concentrate urine before they lead urine to the minor calyces. Antidiuretic Hormone (ADH, from the hypothalamus) directs the collecting ducts to concentrate urine.

What is the distal convoluted tubule?

The distal convoluted tubule is the nephron segment that lies immediately downstream of the macula densa. Although short in length, the distal convoluted tubule plays a critical role in sodium, potassium, and divalent cation homeostasis.

What drains the blood from the glomerulus?

The glomerulus receives its blood supply from an afferent arteriole of the renal arterial circulation. Unlike most capillary beds, the glomerular capillaries exit into efferent arterioles rather than venules.

How does reabsorption occur in the proximal convoluted tubule?

Fluid in the filtrate entering the proximal convoluted tubule is reabsorbed into the peritubular capillaries. … Sodium reabsorption is primarily driven by this P-type ATPase. 60-70% of the filtered sodium load is reabsorbed in the proximal tubule through active transport, solvent drag, and paracellular electrodiffusion.

What is the function of the distal convoluted tubule quizlet?

Freely permeable to water. Thick segment of ascending limb. What is the Distal Convoluted Tubule? DCT – Functions more in secretion than reabsorption.

What is the main function of the collecting tubule?

The functions of the collecting tubes are transportation of urine and absorption of water. It is thought that the tissue of the kidney’s medulla, or inner substance, contains a high concentration of sodium.

What is the difference between proximal and distal convoluted tubule?

A proximal convoluted tubule drains filtrate away from a renal corpuscle. A loop of Henle descends into the medulla, makes a hairpin turn, and returns to the cortex. The distal convoluted tubule passes near to the original corpuscle (at the juxtaglomerular apparatus), then leads to a collecting duct.

When one eats a high sodium meal Why does it not raise the sodium ion concentration of body fluids quizlet?

Water will move from the ECF into the cells. reabsorb sodium ions from the tubular fluid. When one eats a high-sodium meal, why does it not raise the sodium ion concentration of body fluids? Osmosis moves water from the digestive epithelium to the ECF.

Which is a function of the collecting ducts?

Finally, the inner medullary collecting duct has two major functions in urinary concentration: first, it adds net urea to the papillary interstitium, and second, it allows the generation of maximally concentrated urine due to osmotic water equilibration.

Does the distal convoluted tubule have microvilli?

Finally, the distal convoluted tubule. These tubules are less numerous than the proximal convoluted tubules. The epithelial cells are cuboidal, with very few microvilli. The cells stain more palely than those of the proximal convoluted tubule.

What hormone controls reabsorption of water in the collecting duct?

Antidiuretic HormonePhysiologic Effects of Antidiuretic Hormone Antidiuretic hormone binds to receptors on cells in the collecting ducts of the kidney and promotes reabsorption of water back into the circulation. In the absense of antidiuretic hormone, the collecting ducts are virtually impermiable to water, and it flows out as urine.

Which of the following is the function of the proximal convoluted tubule?

The function of the proximal tubule is essentially reabsorption of filtrate in accordance with the needs of homeostasis (equilibrium), whereas the distal part of the nephron and collecting duct are mainly concerned with the detailed regulation of water, electrolyte, and hydrogen-ion balance.

What vein is found between 2 renal pyramids?

The urine then flows to the bladder by way of the renal pelvis and a duct known as the ureter. Between the pyramids are major arteries termed the interlobar arteries. Each interlobar artery branches over the base of the pyramid.

What does the proximal convoluted tubule do in the kidney?

The proximal convoluted tubule avidly reabsorbs filtered glucose into the peritubular capillaries so that it is all reabsorbed by the end of the proximal tubule. The mechanism for glucose reabsorption was described in Chapter 7.4. The proximal tubule is the only site for glucose reabsorption.