BIOLOGY 12TH ED (LL) W/ CONNECT
12th Edition
ISBN: 9781264898091
Author: Raven
Publisher: MCG
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Textbook Question
Chapter 49, Problem 4U
An important function of the excretory system is to eliminate excess nitrogen produced by
a. Frog
c. Iguana
b. Freshwater fish
d. Camel
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Students have asked these similar questions
Which of the following correctly lists the three forms of nitrogenous waste in order from least to most toxic?
A.
uric acid, ammonia, urea
B.
urea, uric acid, ammonia
C.
uric acid, urea, ammonia
D.
urea, ammonia, uric acid
E.
ammonia, urea, uric acid
Urea...
A. Is the least expensive nitrogen end-product to produce
B. Is the least toxic nitrogen end-product
C. Is excreted by diffusion across the body surface or gill of aquatic animals
D. Provides the greatest water savings (in terms of excretion of nitrogen waste products)
E. None of the above
Which of the following is not correct?a. Uric acid is produced from the breakdown of amino acids.b. Creatinine is produced from breakdown reactions in the muscles.c. Urea is the primary nitrogenous waste of humans.d. Ammonia results from the deamination of amino acids.
Chapter 49 Solutions
BIOLOGY 12TH ED (LL) W/ CONNECT
Ch. 49.1 - Prob. 1LOCh. 49.1 - Prob. 2LOCh. 49.2 - Identify the relative toxicity and solubility of...Ch. 49.3 - Prob. 1LOCh. 49.3 - Define reabsorption and secretion.Ch. 49.4 - Prob. 1LOCh. 49.4 - Explain the role of the loop of Henle in the...Ch. 49.5 - Prob. 1LOCh. 49.5 - Prob. 2LOCh. 49.5 - Prob. 3LO
Ch. 49.6 - Prob. 1LOCh. 49.6 - Prob. 2LOCh. 49 - Prob. 1DACh. 49 - Which of the following is NOT an ion...Ch. 49 - Prob. 2UCh. 49 - A sharks blood is isotonic to the surrounding...Ch. 49 - An important function of the excretory system is...Ch. 49 - Which of the following is a function of the...Ch. 49 - Humans excrete their excess nitrogenous wastes as...Ch. 49 - An osmoregulator would maintain its internal...Ch. 49 - Prob. 1ACh. 49 - A viral infection that specifically interferes...Ch. 49 - Diuretics are drugs that can be used to treat high...Ch. 49 - Caffeine inhibits the secretion of ADH. Prior to...Ch. 49 - You and your study partner want to draw the...Ch. 49 - You are studying renal function in different...Ch. 49 - Prob. 1SCh. 49 - Johns doctor is concerned that Johns kidneys may...
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- Choose 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 saltsarrow_forwardWhy is ammonia not used as a nitrogenous waste compound in terrestrial animals? a)Ammonia is highly toxic, and to minimize that toxicity it must be excreted in large volumes of water. b)Urea and uric acid both have more nitrogen atoms than ammonia, making them more efficient at c)Ammonia is used by reptiles and birds, because it is less toxic to developing embryos than urea. d)Ammonia has more free energy than urea, so ammonia waste is converted to urea to capture some of that free energy.arrow_forwardThe bodily fluids of freshwater fish contain higher concentration of dissolved solids in their surroundings, so they tend to bloat (take in water) or lose electrolytes. How can freshwater fish avoid this? 1.) By drinking lots of water? 2.) By actively transporting ions out from the gills into the water? 3.) by excreting highly concentrated urine? 4.) by resorbing ions in nephronsarrow_forward
- Which of the following excretory organs does not employ ultrafiltration? A. The Malpighian tubules of insects B. The antennal gland of crustaceans C. The flame cells of flatworms D. The vertebrate kidney E. All of A, B, C and D employ ultrafiltrationarrow_forwardWhich of the following causes the kidney to conserve/retain sodium? a. aldosterone b. vasopressin c. oxytocin d. corticosterone Which of the following class of chemicals exerts its effects by entering cells, binding intracellular receptors, and affecting gene expression? a. Peptides b. Steroids c. Bioactive amines d. Amino acidsarrow_forward19. How does Dialysis help patient with kidney disease to live longer? A. This works like a kidney and filters out extra salt, waste, and fluid. B. The machines mimic the function of nephrons that purify the blood. C. Dialysis keeps the body in balance by removing waste, salt, and extra water to prevent them from building up in the body. D. A pump in the hemodialysis machine quickly draws out your blood, then sends it through another machine called a dialyzer. obin 20. Growing children as well as adults are fun of eating junk foods or something salty and sweety. Why is it that after eating those foods, there is a desire to drink more water? A. Cells will not be dehydrated. B. Solute concentration is the same inside and outside cell. C. Solute concentration in the extracellular fluid is increased. D. Solute concentration in the extracellular fluid is decreased.arrow_forward
- 1 Uric acid is a waste product used by birds and insects because: a. It is very light. b. It is metabolically cheap to produce. c. It does not require a kidney for its production. d. It makes a coloured pigment for the bird or insect. e. It can easily be converted into useful products like feathers. 2 The nephridia of an earthworm differs from the human nephron in that the nephridia: a. Has no reabsorption of salts. b. Has no reabsorption of water. c. Does not filter the blood. d. Selectively pumps ammonia into the nephridia. e. Is excreting ammonia instead of urea. 3 Oxygen dissociation in your blood: a. Is the release of oxygen to the tissues. b. Occurs in the lungs. c. Is the ionisation of oxygen in water (blood plasma). d. Is controlled by the enzyme carbonic anhydrase. e. Allows oxygen to attach to the haemoglobin. 4 Veins require valves, while arteries do not, because: a. The veins keep branching and the valves control which branch is open. b. Veins have blood that is…arrow_forwardPart 1 Marina is taking a drug that is metabolized into pharmacologically inert, water-soluble by-products before being excreted. What will be the effect of this process? A. Marina's body will be less able to reabsorb the substance before it is excreted. B, Marina's body will be more likely to reabsorb the substance before it is excreted. C.The substance will be inactivated before it is excreted. D. The substance will have its strongest effect just before it is excreted. Part 1a A drug administered via inhalation is absorbed through the nasal membranes and sinuses. True Falsearrow_forwardBirds that live in marine environments and thus lack access to fresh drinking water A)obtain water by eating only osmoregulating prey. B)osmoregulate without using a transport epithelium for this purpose. C)drink seawater and secrete excess ions through their kidneys only. D)drink seawater and secrete excess ions mainly through their nasal salt glands. E)have plasma that is isoosmotic to ocean water.arrow_forward
- 46. Muscular dystrophy occurs when the connection between the nerves and muscle is lost. It is caused by a toxin from the Clostridium tetani bacterium. A. True B. False ____ 47. Skeletal muscles are attached to bones by tendons. A. True B. False ____ 48. The urinary system removes metabolic waste products from an organism. A. True B. Falsearrow_forwardMany caffeinated beverages such as coffee, tea, and cola drinks have diuretic effects on the body. Why do caffeinated beverages increase the volume of urine? Select one: a. Caffeine increases ADH, which increases the reabsorption of water in the kidneys. b. Caffeine inhibits ADH, which reduces the reabsorption of water in the kidneys. c. Caffeine increases ADH, which reduces the reabsorption of water in the kidneys. d. Caffeine inhibits ADH, which increases the reabsorption of water in the kidneys.arrow_forwardWhat substance(s) may be found in the urine of someone with kidney disease or a urinary tract infection? Choose all that apply. a. Proteins b. Blood c. Urea d. Saltsarrow_forward
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