The digestion and utilization of which nutrient creates the greatest need for ni
ID: 84161 • Letter: T
Question
The digestion and utilization of which nutrient creates the greatest need for nitrogenous waste excretion by osmoregulatory organs? a) starch b) protein c) fat d) cellulose Urea is: a) more toxic than ammonia b) less toxic than ammonia c) the same toxicity as ammonia Which of the following matches between principle form of nitrogenous waste and animal is NOT correct? a) freshwater fish; ammonia b) mammals; urea c) insects: uric acid d) birds; urea Which of the following statements about the transfer of fluid from the glomerulus to Bowman's capsule is CORRECT? a) It is very selective, only transferring water and urea. b) It transfers water, electrolytes and other small molecules such as glucose and urea. In the human kidney, the path the filtrate (pre-urine) takes from formation to exit is: a) loop of Henle, proximal tubule, distal tubule, Bowman's capsule b) distal tubule, Bowman's capsule, loop of Henle, proximal tubule c) Bowman's capsule, loop of Henle, distal tubule, proximal tubule d) Bowman's capsule, proximal tubule, loop of Henle, distal tubule When antidiuretic hormone (ADH) production is increased, the collecting ducts reabsorb _____ water and urine becomes _____ concentrated. a) more, less b) more, more c) less, more d) less, less The entire subunit of a kidney that purifies blood and restores solute and water balance is called a: a) glomerulus b) loop of Henle c) Bowman's capsule d) nephron In the proximal tubule, water and salts are _____ the filtrate. a) secreted into b) reabsorbed fromExplanation / Answer
1) b protein .the peptide bonds have amino groups which have nitrogen .hence need for nitrogen waste extcretion arises .
4 b the transfer of various small molecules occurs in the glomreulus and not just water and urea. Large proteins cannot be transferred.
2) b less toxic than ammonia. Urea is formed in the urea cycle from ammonia in yreotelic animals as a less toxic product so that constant excretion is not required.
3 d birds don't excrete nitrogenous waste as urea but rather as uric acid.