8. State two features in the nephron that facilitate ultra filtration19. The table below shows a description of size of glomeruli and renal tubules of two animalswhich are adapted to living in different environment:-Animal A Animal BFOR MARKING SCHEMES CALL/WHATSAP P0705525657/077019580716Glomeruli large and few small and manyRenal tubules short longa) Name the likely environment in which animal A livesb) Suggest the main nitrogenous waste produced by animal Bc) Name the organelle of osmoregulation in each of the following animal: i) Parameciumii) Insects

19. The table below shows a description of size of glomeruli and renal tubules of two animalswhich are adapted to living in different environment:-Animal A Animal BFOR MARKING SCHEMES CALL/WHATSAP P0705525657/077019580716Glomeruli large and few small and manyRenal tubules short longa) Name the likely environment in which animal A livesb) Suggest the main nitrogenous waste produced by animal Bc) Name the organelle of osmoregulation in each of the following animal: i) Parameciumii) Insect

1. Unlike an earthworm’s metanephridia, a mammalian nephron(A) is intimately associated with a capillary network.(B) functions in both osmoregulation and excretion.(C) receives filtrate from blood instead of coelomic fluid.(D) has a transport epithelium.2. Which process in the nephron is least selective?(A) filtration(B) reabsorption(C) active transport(D) secretion3. Which of the following animals generally has the lowestvolume of urine production?(A) vampire bat(B) salmon in fresh water(C) marine bony fish(D) freshwater flatwormLevels 3-4: Applying/Analyzing4. The high osmolarity of the renal medulla is maintained bywhich of the following?(A) active transport of salt from the upper region of thedescending limb.(B) the loose packing of juxtamedullary nephrons.(C) diffusion of urea into the collecting duct.(D) diffusion of salt from the descending limb of the loop ofHenle.5. In which of the following species should natural selection favorthe highest proportion of juxtamedullary nephrons?(A) a river otter(B) a mouse species living in a temperate broadleaf forest(C) a mouse species living in a desert(D) a beaver6. African lungfish, which are often found in small, stagnantpools of fresh water, produce urea as a nitrogenous waste. Whatis an advantage of this adaptation?(A) Urea takes less energy to synthesize than ammonia.(B) Small, stagnant pools do not provide enough water to diluteammonia, which is toxic.(C) Urea forms an insoluble precipitate.(D) Urea makes lungfish tissue hypoosmotic to the pool.999

Which of the following is least likely to be present in the glomerular filtrate (the filtrate produced by the nephron before it enters the loop of Henle) of a healthy adult nephron?

Which part of the nephron is involved in filtration? peritubular capillary glomerular capsule loop of Henle proximal convoluted tubule

What part of a nephron is responsible for reabsorbing all the nutrients and most of the water? proximal convoluted tubule (PCT) loop of Henle distal convoluted tubule (DCT) renal corpuscle