1
Diabetes insipidus is the result of a lack ofA) insulin B) ADH C) aldosterone D) glucagon 2
Animals that cannot make urine more concentrated than their blood can reabsorb additional water in theA) cloaca B) renal pelvis C) Bowman's capsule D) loop of Henle 3
Elasmobranchs living in a marine environment compensate for their hypoosmotic system relative to the sea byA) drinking sea water B) pumping Na+ into the blood C) excreting massive amounts of water D) reabsorbing urea 4
Most of the water and K+ passed from the insect's Malpighian tubules into the digestive system is reabsorbed through theA) rectum B) midgut C) intestine D) foregut 5
The earthworm excretory structure is considered to beA) a protonephridium B) an ananephridium C) a metanephridium D) a telonephridium 6
Which of the following animals have loops of Henle?A) insects B) fish C) birds D) all of the above E) none of the above 7
Aquatic organisms that are hypoosmotic relative to the surrounding water tend toA) gain water from the environment B) gain salts from the environment C) both of the above D) none of the above 8
Which of the following is an osmoconformer?A) a shark B) a human C) all vertebrates are osmoconformers D) no vertebrates are osmoconformers 9
Which type of feedback systems are more common in vertebrates, positive or negative?A) positive B) negative C) they are both very common D) they are both extremely rare 10
The excretory organs of insects are calledA) flame cells B) contractile vacuoles C) collecting ducts D) nephrons E) Malpighian tubules 11
Which of the following would be least likely to be found in the glomerular filtrate?A) plasma proteins B) glucose and amino acids C) water D) urea E) all of the above are likely to be found in the glomerular filtrate 12
Urea is formed in theA) loop of Henle B) collecting duct C) glomerulus D) liver E) urinary bladder 13
The tube that leads from the kidney to the bladder is called theA) loop of Henle B) collecting duct C) nephron D) urethra E) ureter 14
Filtrate moves into the Bowman's capsule from theA) collecting duct B) loop of Henle C) glomerulus D) proximal convoluted tubule E) distal convoluted tubule 15
The greatest amount of filtrate gets reabsorbed from what part of the nephron?A) the glomerulus B) the proximal convoluted tubule C) the distal convoluted tubule D) the loop of Henle E) the collecting duct 16
Freshwater fish excreteA) ammonia B) uric acid C) urea D) all of the above E) no nitrogenous waste product 17
Which nitrogenous waste is concentrated in a shark's blood?A) ammonia B) uric acid C) nitrate D) N2 E) urea 18
Marine reptiles eliminate excess salts through theirA) salt glands in their heads B) kidneys C) general body surface (skin) D) all of the above E) none of the above; marine reptiles don't eliminate excess salts 19
Which of the following animals has the most concentrated urine relative to its blood plasma?A) sea turtle B) bird C) human D) camel E) sponge 20
The urine of a pocket mouse, compared to its blood plasma, isA) the same concentration B) 4 times as concentrated C) 14 times as concentrated D) 22 times as concentrated E) 38 times as concentrated 21
How many nephrons does the typical human have?A) 2 B) 20 C) about 200 D) about 20,000 E) about 2 million 22
The more concentrated the urine that a mammal can produce, the longer are itsA) glomeruli B) proximal convoluted tubules C) loops of Henle D) Bowman's capsules E) Malpighian tubules 23
The part of the kidney that is least permeable to water is the walls of theA) collecting duct B) ascending limb C) glomerulus D) descending limb E) Bowman's capsule 24
The lower portions of some loops of Henle and the collecting ducts are located in the renalA) cortex B) medulla C) pelvis D) artery E) bladder 25
Which of the following statements is true?A) ADH makes the collecting duct more permeable to water. B) Guano contains high concentrations of urea. C) Aldosterone is produced by the hypothalamus in response to high levels of sodium ions in the blood. D) Uric acid is the most soluble of the nitrogenous waste products. E) all of the above 26
Which of the following is recovered in the collecting duct of the nephron?A) glucose B) water C) NaCl D) proteins E) potassium ions 27
Malpighian tubules are organs for excreting nitrogenous wastes found in:A) echinoderms. B) fish. C) insects. D) annelids. E) flatworms. 28
Uric acid is excreted by all of the following except:A) birds. B) bony fish. C) adult amphibians. D) land snails. E) insects. 29
Under normal conditions, most nutrients are reabsorbed in what portion of the nephron?A) proximal convoluted tubules B) descending limb of the loop of Henle C) ascending limb of the loop of Henle D) distal convoluted tubules E) collecting tubules 30
Urine is conducted from the kidney to the urinary bladder through the:A) uterine tube. B) urethra. C) ureter. D) renal tubule. E) vasa recta. 31
Which of the following statement is incorrect?A) Glomerular hydrostatic pressure and filtration are directly related to systemic blood pressure. B) In the proximal tubules, glucose and amino acids actively move out of the glomerular filtrate by sodium cotransport. C) Filtrate in the descending limb of Henle has the highest osmolality. D) Both ADH and aldosterone attempt to decrease urine output. E) A person with uncontrolled diabetes mellitus will have a higher than normal solute concentration in the urine. 32
The nitrogen excreted by animals comes from the hydrolysis of proteins in the diet, as well as from the continuous breakdown of cellular proteins.A) True B) False 33
Unlike ammonia, urea is nearly insoluble in water and can be excreted as practically a solid waste.A) True B) False 34
The renal pyramids make up the internal core, or medulla, of the mammalian kidney.A) True B) False 35
In order to maintain homeostasis, sensors detect changes in a physiological activity.A) True B) False