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Most substances are reabsorbed or secreted in this part of the renal tubule?
Most substances are reabsorbed or secreted in the proximal convoluted tubule (PCT) of the renal tubule. The PCT is highly efficient in reabsorbing essential molecules such as glucose, amino acids, and ions, while also secreting waste products and toxins. This segment plays a crucial role in regulating the composition of blood and maintaining homeostasis.
What are the similarities between the distal tubule and the proximal tubule?
- proximal tubule : • Selective reabsorption of nutrients from filtrate back into blood by active and passive transport. • Within proximal tubule, pH is controlled by secretion of hydrogen ions (H1) and reabsorption of bicarbonate ions (HCO32). - distal tubule • Selective reabsorption of nutrients from blood into nephron by active transport. Distal tubule helps regulate potassium (K1) and salt (NaCl) concentration of body fluids. • As in proximal tubule, pH is controlled by tubular secretion of hydrogen ions (H1) and reabsorption of bicarbonate ions (HCO32).
Is the collecting duct the site that drains the distal convoluted tubule?
No, the collecting duct is the site where the filtrate from multiple nephrons is collected and the final adjustments to urine concentration are made. The distal convoluted tubule drains into the collecting duct.
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.
What is the last tubule in the nephron?
The last tubule in the nephron is the distal convoluted tubule. It is responsible for further reabsorption of water and electrolytes, as well as secretion of waste products.
In which region of the nephron does secretion occur?
The distal tubule
Where are hydrogen and potassium ions secreted inot the urine?
Hydrogen ions are primarily secreted into the urine in the proximal tubule and collecting ducts of the kidney, while potassium ions are mostly secreted in the distal tubule and collecting ducts. This process helps maintain the acid-base balance and electrolyte levels in the body.
What is the primary site of tubular reabsorption in the kidneys?
The distal convoluted tubule or the collecting tube.
What are the substances reabsorbed in distal convoluted tubule?
When blood is filtered at the glomerulus (filter unit) of the kidney, some substances don't even make it into the nephron. These include proteins, which are simply too big to diffuse from the capillaries and across the Bowman's capsule. As for what substances are reabsorbed (by active transport) into the bloodstream from the nephron, these include glucose, which is too valuable to be lost in urine. Urea and other substances are lost in the urine.
Do secretion usually occur in the distal convoluted tubule and the collecting tubule?
Secretion typically occurs in the distal convoluted tubule and the collecting tubule of the nephron. These segments of the nephron are responsible for actively transporting substances like ions, drugs, and waste products from the blood into the tubular fluid to be excreted in the urine.
What are the subdivisons of the renal tubule?
Proximal convoluted tubule, Loop of henle and Distal convoluted tubule.
What are the components of the renal tubule as they are encountered by filtrate?
proximal continuous tubule loop of henle distal continuous tubule
What is the last portion of the renal tubule?
the three main portions of the renal tubule are the proximal convoluted tubule, the loop of henle, and the distal convoluted tubule. the proximal convoluted tubule is the first portion. The proximal (convulated) tubule.
What histological feature distinguishes proximal convoluted tubule from a distal convoluted tubule?
Proximal convoluted tubules have brush borders or microvilli on the inner edge of the tubule. Distal convoluted tubules do not have this structure.
What are the similarities between the distal tubule and the proximal tubule?
- proximal tubule : • Selective reabsorption of nutrients from filtrate back into blood by active and passive transport. • Within proximal tubule, pH is controlled by secretion of hydrogen ions (H1) and reabsorption of bicarbonate ions (HCO32). - distal tubule • Selective reabsorption of nutrients from blood into nephron by active transport. Distal tubule helps regulate potassium (K1) and salt (NaCl) concentration of body fluids. • As in proximal tubule, pH is controlled by tubular secretion of hydrogen ions (H1) and reabsorption of bicarbonate ions (HCO32).
Where does ADH act on the nephron?
collecting duct (system) and late distal tubule
Is the collecting duct the site that drains the distal convoluted tubule?
No, the collecting duct is the site where the filtrate from multiple nephrons is collected and the final adjustments to urine concentration are made. The distal convoluted tubule drains into the collecting duct.
