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Humans excrete their excess nitrogenous wastes as
a. uric acid crystals.
b. protein.
c. ammonia.
d. urea.
Step by step
Solved in 2 steps
- The afferent arteriole delivers blood to the (a) renal artery (b) efferent arteriole (c) renal vein (d) capillaries of the glomerulus (e) peritubular capillariesHumans excrete their excess nitrogenous wastes as a. uric acid crystals. b. compounds containing protein. c. ammonia. d. urea.One advantage of the excretion of urea instead of uric acid isthat ureaa. requires less energy than uric acid to produce.b. can be concentrated to a greater extent.c. is not a toxic substance.d. requires no water to excrete.e. is a larger molecule.
- Which of these is the most abundantnitrogenous waste in the blood?a. uric acidb. ureac. ammoniad. creatininee. albuminFollow the correct path of a water molecule as it exists the plasma space and ultimately ends its' journey in the urinary bladder. Which "path" below is correct? A. Loop of Henle.Glomerulus.Distal Tubule.Collecting Duct..Renal Pelvis.Ureter B. Collecting Duct..Renal Pelvis..Distal Tubule. .Glomerulus.Loop of Henle..Ureter C. Renal Pelvis .Loop of Henle..Distal Tubule.Glomerulus..Collecting Duct..Ureter D. Glomerulus.Loop of Henle..Distal Tubule..Collecting Duct..Renal Pelvis...UreterThe nephridia of an earthworm excretes urea because: O a. Worms cannot produce the enzymes needed to produce uric acid. O b. The urea is used to alter the osmotic pressure of the earthworm. O. Ammonium cannot diffuse out through the skin. O d. Urea is completely non-toxic. Oe. Urea does not result in any water loss.
- High levels of ammonium ions in the urine indicatea. a high level of H+ secretion into the urine.b. that the kidneys are causing blood pH to decrease.c. that urine pH is too basic.d. All of these are correct.In a healthy person, which substance(s) should NOT be found in urine in high levels? Choose all that apply. a. Urea b. Simple sugars c. Proteins d. Blood cells e. Amino acids f. Electrolytes such as saltsChoose which of the following substances would be too large to be filtered from the blood into the nephron. a. Urea b. Simple sugars c. Proteins d. Blood cells e. Amino acids f. Electrolytes such as salts
- The nephridia of an earthworm excretes urea because: O a. The urea is used to alter the osmotic pressure of the earthworm. O b. Urea is completely non-toxic. O c. Worms cannot produce the enzymes needed to produce uric acid. O d. Urea does not result in any water loss. O e. Ammonium cannot diffuse out through the skin.The color of urine is determined mainly by a. diet b. filtration rate c. byproducts of red blood cell breakdown d. filtration efficiencySodium balance is controlled by which of the following processes? a. glomerular filtration rate and sodium reabsorption b. glomerular filtration rate and renin production c. sodium reabsorption and potassium secretion d. all of the above e. none of the choices