front 1 1) 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 | back 1 Answer: B |
front 2 2) Organisms categorized as osmoconformers are most likely | back 2 Answer: B |
front 3 3) The body fluids of an osmoconformer would be ________ with its
________ environment. | back 3 Answer: D |
front 4 4) Compared to the seawater around them, most marine invertebrates
are | back 4 Answer: C |
front 5 5) The fluid with the highest osmolarity is | back 5 Answer: D |
front 6 6) Birds that live in marine environments and thus lack access to
fresh drinking water | back 6 Answer: C |
front 7 7) Osmoconforming sharks take in water, as needed, | back 7 Answer: B |
front 8 8) A human who has no access to fresh water but is forced to drink
seawater instead | back 8 Answer: B |
front 9 9) Many marine and freshwater bony fish achieve osmoregulation via
| back 9 Answer: E |
front 10 10) 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 | back 10 Answer: C |
front 11 11) The necropsy (postmortem analysis) of a freshwater fish that died
after being placed accidentally in saltwater would likely show that
| back 11 Answer: A |
front 12 12) Urea is produced in the | back 12 Answer: A |
front 13 13) Urea is | back 13 Answer: C |
front 14 14) Which nitrogenous waste has the greatest number of nitrogen
atoms? | back 14 Answer: D |
front 15 15) Ammonia is likely to be the primary nitrogenous waste in living
conditions that include | back 15 Answer: A |
front 16 16) Among vertebrate animals, urea | back 16 Answer: C |
front 17 17) The nitrogenous waste that requires the most energy to produce is
| back 17 Answer: D |
front 18 18) Excessive formation of uric acid crystals in humans leads to
| back 18 Answer: C |
front 19 19) Ammonia | back 19 Answer: A |
front 20 20) The advantage of excreting nitrogenous wastes as urea rather than
as ammonia is that | back 20 Answer: B |
front 21 21) The primary nitrogenous waste excreted by birds is | back 21 Answer: E |
front 22 22) Which nitrogenous waste requires hardly any water for its
excretion? | back 22 Answer: C |
front 23 23) In animals, nitrogenous wastes are produced mostly from the
catabolism of | back 23 Answer: C |
front 24 24) Birds secrete uric acid as their nitrogenous waste because uric
acid | back 24 Answer: C |
front 25 25) Among the following choices, the most concentrated urine is
excreted by | back 25 Answer: B |
front 26 26) Materials are returned to the blood from the filtrate by which of
the following processes? | back 26 Answer: C |
front 27 27) Excretory structures known as protonephridia are present in
| back 27 Answer: A |
front 28 28) Excretory organs known as Malpighian tubules are present in
| back 28 Answer: C |
front 29 29) The osmoregulatory/excretory system of a freshwater flatworm is
based on the operation of | back 29 Answer: A |
front 30 30) Freshwater flatworms form a urine that is typically | back 30 Answer: E |
front 31 31) The osmoregulatory process called secretion refers to the
| back 31 Answer: C |
front 32 32) The osmoregulatory/excretory system of an earthworm is based on
the operation of | back 32 Answer: B |
front 33 33) The osmoregulatory/excretory system of an insect is based on the
operation of | back 33 Answer: C |
front 34 34) Which of the following pairs of organisms excrete nitrogenous
wastes in the form of uric acid? | back 34 Answer: B |
front 35 35) Choose a pair that correctly associates the mechanism for
osmoregulation or nitrogen removal with the appropriate animal.
| back 35 Answer: E |
front 36 36) An excretory system that is partly based on the filtration of
fluid under high hydrostatic pressure is the | back 36 Answer: E |
front 37 37) The transfer of fluid from the glomerulus to Bowman's capsule
| back 37 Answer: D |
front 38 38) Within a normally functioning kidney, blood can be found in
| back 38 Answer: A |
front 39 39) A person with alkalosis will likely excrete urine that has
abnormally high levels of | back 39 Answer: B |
front 40 40) The filtrate in the renal pelvis enters directly from | back 40 Answer: B |
front 41 41) Juxtamedullary nephrons can concentrate salt effectively in the
renal medulla because of their long | back 41 Answer: A |
front 42 42) The filtrate in the proximal convoluted tubule of the human does
not normally include | back 42 Answer: C |
front 43 43) Human urine is usually more acidic than most other body fluids
because | back 43 Answer: A |
front 44 44) The osmolarity of human urine | back 44 Answer: A |
front 45 45) A primary reason that the kidneys have one of the highest
metabolic rates of all body organs is that | back 45 Answer: C |
front 46 46) Low selectivity of solute movement is a characteristic of
| back 46 Answer: D |
front 47 47) If ATP production in a human kidney was suddenly halted, urine
production would | back 47 Answer: C |
front 48 48) Compared to wetland mammals, water conservation in mammals of
arid regions is enhanced by having more | back 48 Answer: A |
front 49 49) Processing of filtrate in the proximal and distal tubules
| back 49 Answer: C |
front 50 50) In humans, the transport epithelial cells in the ascending loop
of Henle | back 50 Answer: C |
front 51 51) The typical osmolarity of human blood is | back 51 Answer: D |
front 52 52) Trauma to the human kidney could result in a urinary filtrate
containing an abnormally high level of | back 52 Answer: D |
front 53 53) When stimulated by aldosterone, the reabsorption of Na+ is
increased along | back 53 Answer: E |
front 54 54) Increased ADH secretion is likely after | back 54 Answer: B |
front 55 55) After blood flow is artificially reduced at one kidney, you would
expect that kidney to secrete more of the hormone known as | back 55 Answer: C |
front 56 56) After drinking alcoholic beverages, increased urine excretion is
the result of | back 56 Answer: C |
front 57 57) Osmoregulatory adjustment via the renin-angiotensin-aldosterone
system can be triggered by | back 57 Answer: B |
front 58 58) Antidiuretic hormone (ADH) functions at the cellular level by
| back 58 Answer: D |
front 59 59) ADH and RAAS work together in maintaining osmoregulatory
homeostasis through which of the following ways? | back 59 Answer: B |
front 60 ![]() Use the following structural formulas to identify the following items | back 60 Answer: A |
front 61 ![]() Use the following structural formulas to identify the following items | back 61 Answer: B |
front 62 ![]() Use the following structural formulas to identify the following items | back 62 Answer: C |
front 63 63) In a laboratory experiment with three groups of students, one
group drinks pure water, a second group drinks an equal amount of
beer, and a third group drinks an equal amount of concentrated salt
solution, all during the same time period. Their urine production is
monitored for several hours. Which groups are expected to have the
greatest and least amounts of urine, respectively? | back 63 Answer: A |
front 64 64) Unlike an earthworm's metanephridia, a mammalian nephron | back 64 Answer: D |
front 65 65) Which process in the nephron is least selective? | back 65 Answer: A |
front 66 66) Which of the following animals generally has the lowest volume of
urine production? | back 66 Answer: C |
front 67 67) The high osmolarity of the renal medulla is maintained by all of
the following except | back 67 Answer: E |
front 68 68) Natural selection should favor the highest proportion of
juxtamedullary nephrons in which of the following species? | back 68 Answer: D |
front 69 69) 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? | back 69 Answer: B |