Tubule example sentences

DCT and collecting duct allow extensive reabsorption of water and certain electrolytes, which help in osmoregulation: H+, K+ and NH3 could be secreted into the filtrate by the tubules to maintain the ionic balance and pH of body fluids.A hairpin shaped Henle's loop is the next part of the tubule which has a descending and an ascending limb.Similarly, small amounts of urea enter the thin segment of the ascending limb of Henle's loop which is transported back to the interstitium by the collecting tubule.Protonephridia, nephridia, malpighian tubules, green glands and the kidneys are the common excretory organs in animals.asopressin acts mainly at the kidney and stimulates resorption of water and electrolytes by the distal tubules and thereby reduces loss of water through urine (diuresis).Aldosterone acts mainly at the renal tubules and stimulates the reabsorption of Na+ and water and excretion of K+ and phosphate ions.The tubule continues further to form a highly coiled network – proximal convoluted tubule (PCT).ADH facilitates water reabsorption from latter parts of the tubule, thereby preventing diuresis.At this stage the chromosomes align at the equator and the microtubules from opposite poles of the spindle get attached to the kinetochores (Figureure 4) of sister chromatids.Presence of such interstitial gradient helps in an easy passage of water from the collecting tubule thereby concentrating the filtrate (urine).Malpighian tubules are the excretory structures of most of the insects including cockroaches.A comparison of the volume of the filtrate formed per day (180 litres per day) with that of the urine released ( 5 litres), suggest that nearly 99 per cent of the filtrate has to be reabsorbed by the renal tubules.The renal tubule begins with a double walled cup-like structure called Bowman's capsule, which encloses the glomerulus.Testis is composed of seminiferous tubules and stromal or interstitial tissue.PTH also stimulates reabsorption of Ca2+ by the renal tubules and increases Ca2+ absorption from the digested food.