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Biology, 6/e
Author Dr. George B. Johnson, Washington University
Author Dr. Peter H. Raven, Missouri Botanical Gardens & Washington University
Contributor Dr. Susan Singer, Carleton College
Contributor Dr. Jonathan Losos, Washington University

Maintaining Homeostasis

Multiple Choice Quiz

Please answer all questions



1

Diabetes insipidus is the result of a lack of
A)insulin
B)ADH
C)aldosterone
D)glucagon
2

Animals that cannot make urine more concentrated than their blood can reabsorb additional water in the
A)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 by
A)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 the
A)rectum
B)midgut
C)intestine
D)foregut
5

The earthworm excretory structure is considered to be
A)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 to
A)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 called
A)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 the
A)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 the
A)loop of Henle
B)collecting duct
C)nephron
D)urethra
E)ureter
14

Filtrate moves into the Bowman's capsule from the
A)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 excrete
A)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 their
A)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, is
A)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 its
A)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 the
A)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 renal
A)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