Concept explainers
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ANATOMY AND PHYSIOLOGY THE UNITY OF FORM
- Name the phenomenon of removal of urea as excretory product.arrow_forwardWhich statement about nitrogenous wastes is true? ammonia cannot be concentrated as much as urea and uric acid because it is more toxic some vertebrates are able to avoid producing nitrogenous wastes by using only anaerobic respiration most vertebrates that produce urea excrete the urea as salt crystals that have precipitated out of solution to conserve water many saurapsids excrete their nitrogenous wastes as nitric oxide All of these are correctarrow_forwardProteus mirabilis produces the enzyme grease, which converts urea into ammonia. Explain why patients with a UTI caused by proteus mirabilis would have a higher than normal urine PHarrow_forward
- Proteus mirabilis produces the enzyme urease, which converts urea into ammonia. If a patient has a urinary tract infection (UTI) caused by Proteus mirabilis, what signs or symptoms might be observed? Cloudy urine. As the bacteria multiply, the urine becomes progressively cloudier because of the large numbers of cells in suspension. High ammonia content contributes to the strong smell of urine from patients with a UTI. A higher-than-normal urine pH. With large numbers of bacteria producing urease and converting urea into ammonia, the urine pH would be very basic. All of the answers are correct.arrow_forwardExplain the structure and components of a typical URI. Provide examples of common URI schemes.arrow_forwardIf only a very small amount of urea were present in the interstitial fluid of the kidney instead of its normal concentration, how would it affect the kidney's ability to concentrate urine? asaparrow_forward
- State the implication of a high value of NPN in blood and urine. What does the amount of urea, ammonia, and creatinine in the urine tell us about renal function? Which food substances can lead to an increased value of NPN in the blood?arrow_forwardName the condition in which there is presence of sugar in urine.arrow_forwardA friend who is enthusiastic about health foods and organic gardening asks you whether urea is “organic” or “chemical.” How do you reply to this question?arrow_forward
- ///;($&(;;;;arrow_forwardIn general terms, explain the role in insects of the malpighian tubules and rectum in conserving water, ions, and amino acids and removing nitrogen waste.arrow_forwardA man fed a low protein-high carbohydrate diet excreted 6.2 grams of urea per day. After three days 16. without food, the same man excreted 26.2 grams of urea per day. Explain these data.arrow_forward