What is the main function of the descending loop of Henle?
The descending portion of the loop of Henle is extremely permeable to water and is less permeable to ions, therefore water is easily reabsorbed here and solutes are not readily reabsorbed.
What is the descending limb?
Anatomical terminology. Within the nephron of the kidney, the descending limb of loop of Henle is the portion of the renal tubule constituting the first part of the loop of Henle.
What moves out of the descending limb?
In summary, the loop of Henle is surrounded by tissue fluid which has a high concentration of ions in it. This causes water to move out of the descending limb by osmosis. This produces a more concentrated filtrate because of this, ions move out of the loop in the thin ascending limb.
What does the ascending limb reabsorb?
Thick ascending limbs of Henle’s loop have at least three major roles: (1) They reabsorb sodium chloride which dilutes the urine. (3) They reabsorb large amounts of potassium, calcium, and magnesium in an energy-efficient manner.
What does the ascending limb of the nephron loop do?
The ascending limb of the loop of Henle is a direct continuation from the descending limb of loop of Henle, and one of the structures in the nephron of the kidney. The ascending limb has a thin and a thick segment. The ascending limb drains urine into the distal convoluted tubule.
What is the main function of the descending loop of Henle quizlet?
The principal function of the loop of Henle is in the recovery of water and sodium chloride from urine. This function allows production of urine that is far more concentrated than blood, limiting the amount of water needed as intake for survival.
What is the function of DCT?
The distal convoluted tubule (DCT) is a short nephron segment, interposed between the macula densa and collecting duct. Even though it is short, it plays a key role in regulating extracellular fluid volume and electrolyte homeostasis.
How does the descending limb of Henle affect the filtrate?
In the descending limb of the loop of Henle, water is removed from the filtrate by aquaporin proteins (water channels). The result is a highly concentrated filtrate at the bottom of the loop. The filtrate then enters the thick ascending limb, which is permeable to sodium ions.
When urine moves through descending limb it becomes hypertonic?
When the urine moves through the descending limb, it becomes hypertonic and as it passes through the ascending limb of the loop of Henle, it becomes hypotonic because the descending limb is permeable to water and impermeable to sodium ions, while the ascending limb is impermeable to water and permeable to sodium ions.
What is the function of the ascending limb of the nephron loop?
The thick ascending limb expresses a sodium-potassium-chloride cotransporter and helps reabsorb approximately a third of the filtered sodium and chloride from the fluid in the tubular lumen into the blood. Other functions of the loop of Henle include: Homeostatic mechanisms to regulate the extracellular fluid volume.
What is the difference between ascending and descending loop of Henle?
The key difference between ascending and descending loop of Henle is that ascending loop of Henle is the thicker segment of the loop of Henle located just after the sharp bend of the loop while descending loop of Henle is the thinner segment located just before the sharp bend of the loop.
What consists of an ascending and descending limb?
The loop of Henle is a U-shaped tube that extends from the proximal tubule. It consists of a descending limb and an ascending limb.
What is ascending limb?
1. one of the paired appendages of the body used in locomotion and grasping; see arm and leg. Called also member, membrum, and extremity. 2. a structure or part resembling an arm or leg. anacrotic limb ascending limb (def. 2).
What is in the ascending limb of the loop of Henle?
The ascending limb of the loop of Henle is a direct continuation from the descending limb of loop of Henle, and one of the structures in the nephron of the kidney. The ascending limb has a thin and a thick segment. The ascending limb drains urine into the distal convoluted tubule .
What is descending testicles?
Testicles form in the abdomen during fetal development. During the last couple of months of normal fetal development, the testicles gradually descend from the abdomen through a tube-like passageway in the groin (inguinal canal) into the scrotum. With an undescended testicle, that process stops or is delayed.