Which nitrogenous waste has the greatest number of nitrogen atoms?
A) ammonia
B) ammonium ions
C) urea
D) uric acid
Answer: D
Learn More :
Biology Chapter 44
- A potassium ion gradient is set up in insect Malpighian tubules through an active transport process. As a result, potassium concentration is higher in the lumen of the tubules than in hemolymph. How would the potassium gradient affect water movement?
- Why are the renal artery and vein critical to the process of osmoregulation in vertebrates?
- The figure above shows a nephron. Filtration takes place in the structure labeled _____.
- African lungfish, which are often found in small, stagnant pools of fresh water, produce urea as a nitrogenous waste. What is the advantage of this adaptation?
- Which of the following most accurately describes selective permeability?
- Through studies of insect Malpighian tubules, researchers found that K+ accumulated on the inner face of the tubule, against its concentration gradient. What can you infer about the mechanism of transport?
- The advantage of excreting nitrogenous wastes as urea rather than as ammonia is that _____.
- In animals, nitrogenous wastes are produced mostly from the catabolism of _____.
- Birds secrete uric acid as their nitrogenous waste because uric acid _____.
- Among the following choices, the most concentrated urine is excreted by _____.
- Urea is produced in the _____.
- Urea is _____.
- Ammonia is likely to be the primary nitrogenous waste in living conditions that include _____.
- Excessive formation of uric acid crystals in humans leads to _____.
- One of the waste products that accumulates during cellular functions is carbon dioxide. It is removed via the respiratory system. What is another waste product that accumulates during normal physiological functions in vertebrates?
- The fluid with the highest osmolarity is _____.
- A human who has no access to fresh water but is forced to drink seawater instead will _____.
- Unlike most bony fishes, sharks maintain body fluids that are isoosmotic to seawater, so they are considered by many to be osmoconformers. Nonetheless, these sharks osmoregulate at least partially by _____.
- The necropsy (postmortem analysis) of a freshwater fish that died after being placed accidentally in saltwater would likely show that _____.
- Which of the following animals generally has the lowest volume of urine production?
- Terrestrial organisms lose water through evaporation. In what ecosystem might an entomologist find a good study organism to examine the prevention of water loss?
- A necropsy (postmortem analysis) of a marine sea star that died after it was mistakenly placed in fresh water would likely show that it died because _____.
- The body fluids of an osmoconformer would be _____ with its _____ environment.
- Compared to the seawater around them, most marine invertebrates are _____.