Animal Physiology MCQs Part VII

1) Urea is removed from blood by the
a) Intestine
b) Kidney
c) Spleen
d) Stomach

2) In man, the urea is mainly produced in the
a) Liver
b) Kidneys
c) Gall bladder
d) Spleen

3) Urea is transported by
a) Plasma
b) Blood
c) RBC
d) WBC

4) The Bidder canal in frog is found in
a) Liver
b) Kidney
c) Testis
d) Ovary

5) The kidneys resemble the contractile vacuoles of protozoans in
a) Expelling excess water
b) Expelling glucose
c) Expelling urea and uric acid
d) Expelling salts

6) The chief nitrogenous waste material in the urine of frog is
a) Ammonia
b) Uric acid
c) Urea
d) Allanotoin

7) Tiny tubes of the kidney are called
a) Axons
b) Dendrons
c) Nephrons
d) Neurons

8) In the kidney of the rabbit, the loops of Henle are found in the
a) Medulla
b) Cortex
c) Pelvis
d) Pyramid

9) Surplus amino acids in the body are broken down to form urea in the
a) Kidneys
b) Liver
c) Spleen
d) Pancreas

10) The nephrostomes in the kidney are functional in the
a) Rabbit
b) Adult frog
c) Tadpole
d) Young of rabbit

11) In man kidneys are
a) Prenephric
b) Mesonephric
c) Metanephric
d) All types

12) In man the kidneys are found
a) In the groin
b) In the thoracic cavity
c) Just under the diaphragm
d) Attached to the dorsal wall of the abdominal cavity

13) Green glands which are excretory in function are found in
a) Spiders
b) Moths
c) Scorpions
d) Crayfishes

14) Urea in human urine is derived from the breakdown of
a) Glucose
b) Amino acids
c) Fats
d) Uric acid

15) What is the alternative name for uriniferous tubules?
a) Cytons
b) Nephridia
c) Nephrons
d) Neurons

16) In the kidney of the rabbit, the loop of Henle is part of the
a) Glomerulus
b) Collecting duct
d) Uriniferous tubule

17) Where would you find the
Loop in the adult rabbit?

a) Arterioles
c) Glomerulus
d) Uriniferous tubule

18) Which one of the following is the simplest excretory organs?
a) Alveoli
b) Epidermis
c) Lung
d) Tubule

19) The vitamin excreted by urine in higher vertebrates is
a) A
b) B
c) K
d) C

20) In which organ of the body is insoluble calcium phosphate eliminated?
a) Liver
b) Kidneys
c) Lungs
d) Large intestine

21) Separation of amino acid into amino and carboxyl group is known as
a) Deamination
b) Excretion
c) Amination
d) Egestion

22) In aquatic organisms, the end product of nitrogen exchange is
a) Urea
b) Nitrogen
c) Ammonia
d) Allantoin

23) The reabsorption of water in the kidneys is under the control of a hormone
a) STH
c) LH
d) ADH

24) The difference between glomerular filtrate and blood plasma lies in the presence or absence of
a) Proteins
b) Potassium
c) First is white and second is yellow
d) First is yellow and second is white

25) In marine teleost fishes
ions are excreted by the

a) Gills
b) Kidneys
c) Neuromast organs
d) Scroll value

26) Snakes and birds are mainly
a) Ammonotelic
b) Aminotelic
c) Ureotelic
d) Uricotelic

27) The least concentration of urea is present in the
a) Renal artery
b) Renal vein
c) Post caval
d) Dorsal aorta

28) Waste products of adenine and guanine metabolism are excreted by
man as

a) Ammonia
b) Urea
c) Uric acid
d) Allantoin

29) The highest concentration of urea is found in the
a) Renal vein
b) Hepatic portal vein
c) Dorsal aorta
d) Hepatic vein

30) Malphighian tubules are the excretory organs in the
a) Cockroach
b) Platyhelminthes
c) Pila
d) Frog

31) Uric acid is excreted in the
a) Frog
b) Rabbit
c) Man
d) Pigeon

32) The term urine can first be used in the
b) Loop of Henle
c) Collecting tubule
d) Urinary bladder

33) What is the average pH value of human urine?
a) 2.00
b) 6.00
c) 7.5
d) 8.00

34) Which of the following is not a structure of the kidney?
a) Cortex
b) Medulla
c) Pelvis
d) Urethra

35) Which is the least toxic nitrogenous waste?
a) Ammonia
b) Urea
c) Ammonia and urea
d) Uric acid

36) The blood leaves the glomerulus through the
a) Afferent arteriole
b) Efferent arteriole
c) Renal veins
d) Renal portal veins

37) In the rabbit the main nitrogenous waste product is
a) Ammonia
b) Urea
c) Uric acid
d) Arginase

38) In the rabbit, the urinary bladder opens into the
a) Uterus
b) Urethra
c) Ureter
d) Vestibule

39) Ammonia is the chief excretory substance in the
a) Camel and whale
b) Cartilaginous fishes
c) Whale and porpoise
d) Fresh water fishes

40) Workers in deep mines usually suffer from dehydration because
a) Water is lost due to evaporation
b) Water is lost due to defecation
c) Water is lost in the form of sweat
d) Water is lost along with salts in the sweat

41) The animal that excretes amino acids without deamination is
a) House fly
b) Frog
c) Unio
d) Spider

42) During glomerular filtration what takes place is
a) Secretion of water and electrolytes
b) Ultra filtration
c) Ultra filtration and reabsorption
d) All of the above

43) The filtrate from glomerulus contains
a) Blood without blood cells and proteins
b) Plasma without sugar
c) Blood with protein but without cells
d) Blood without urea

44) Under normal conditions which one is completely reabsorbed in the
renal tubule?

a) Urea
b) Uric acid
c) Salts
d) Glucose

45) The chief nitrogenous waste in the urine of rabbits or terrestrial mammals

a) Urea
b) Uric acid
c) Ammonia
d) None

46) A condition in which the kidney fails to form urine is
a) Creatinine
b) Hematuria
c) Anuria
d) Ketonuria

47) The liquid which collects in the cavity of

a) Concentrated urine
b) Plasma minus blood proteins
c) Glycogen and water
d) Sulphates and water

48) Excretion means the
a) Removal of useless substances and substances present in excess
b) Formation of those substances which have some role in the body
c) Removal of such substances which have never been part of the body
d) All of these

49) The pyramid in the kidney of mammals is connected to the
a) Cortex
b) Medulla
c) Pelvis
d) Ureter

50) The collecting tubule of a nephron opens into the
a) Pelvis
b) Renal pyramids
c) Renal columns of Bertini
d) None of the above

51) The excretory products of metabolism of creatine in man is
a) Urea
b) Creatinine
c) Uric acid
d) Xanthine

52) In mammals, in which part of the uriniferous tubule does the reabsorption of glucose occur?
a) proximal convoluted tubule
b) Collecting tubule
d) Distal convoluted tubule

53) The maximum absorption of water in mammals is in the
a) lungs
b) skin
c) Kidneys
d) Small intestine

54) Which of the following is correct?
a) The afferent arteriole is narrower than the efferent arteriole
b) The efferent venule is narrower than the afferent venule
c) The efferent arteriole is narrower than the afferent arteriole
d) The afferent venule is narrower than the efferent venule

55) The vessel leading blood (containing nitrogenous waste)
into the
capsule is known as the

a) Afferent arteriole
b) Efferent arteriole
c) Renal artery
d) Renal vein

56) A person who is starving without food, water
or beverages will have

a) More urea in his blood
b) Less urea in his urine
c) Less fat in his urine
d) More glucose in his blood

57) If a person has taken a large amount of meat which contains
a high protein content, his urine will eliminate more of

a) Creatinine
b) Glycogen
c) Glucose
d) Urea

58) The proximal convoluted tubule of the nephrons absorbs
water to

a) 50%
b) 75%
c) 80%
d) 100%

59) Taking into account the structure of the human kidney which
is not included?

a) Cortex
b) Medulla
c) Urethra
d) Pelvis

60) Urea is formed in the
a) Liver
b) Spleen
c) Colon
d) Kidney

61) Absorption of
ions occurs in the

b) Distal convoluted tubule
c) Loop of Henle
d) Proximal convoluted tubule

62) Uremia is a disease in which there is an excess of
a) Cholesterol in the blood
b) Glucose in the blood
c) Urea in the blood
d) None of the above

63) In man, kidney stones are formed by
a) Blockage by fats
b) Deposition of sand in kidney
c) Localization of proteins in the kidney
d) Salts such as oxalate crystallised in the renal pelvis

64) In which part of the excretory system of mammals can you first use the term urine for the fluid it contains?
b) Loop of Henle
c) Collecting tubule
d) Urinary bladder

65) Excess of amino acids are stored in the
a) Liver
b) Spleen
c) Kidney
d) None of the above

66) There is no sugar in the urine. The blood entering
the kidney has more sugar than the blood leaving the kidney

a) Sugar is used by the kidney cells in metabolism
b) Sugar is absorbed by the bladder
c) Sugar is absorbed by the proximal convoluted tubule
d) Sugar is absorbed in the loop of Henle

67) The liquid part of the blood which undergone ultra
filtration from the glomerulus and reached
capsule normally would not contain

a) Albumin
b) Creatinine
c) Sodium chloride
d) Glucose

68) Urea of urine is produced by the breakdown of
a) Amino acids
b) Glucose
c) Sodium chloride
d) Uric acid

69) Water absorption through the loop of Henle and the distal
part of the tubule is controlled by

a) Aldosterone
b) Antidiuretic hormone
c) Androgens
d) Lactogenic hormone

70) In
capsule the glomerulus is made up of capillaries from the

a) Renal vein only
b) Renal artery and renal veins
c) Renal arteriole
d) Renal artery and lymphatics

71) Under which condition does the production of
urine per day increase?

a) On a cold damp day
b) After continuous exercise
c) On a very warm and dry day
d) None of the above

72) Which of the following influences the activity
of the kidney?

a) Gonadotrophins
b) Vasopressin
c) Vasopressin and adrenalin
d) Thyroxine

73) In mammals which blood vessel takes away
blood from the kidney?

a) Afferent arteriole
b) Efferent arteriole
c) Renal vein
d) Renal portal vein

74) The tubular portion of the nephron is responsible
for the absorption of

a) Glucose only
b) Monosaccharides only
c) Sodium ions and blood proteins
d) 99% of water

75) Urea is transported by
a) Blood and plasma
b) Erythrocytes
c) Leucocytes
d) Haemoglobin

76) Which one of the following is not an excretory

a) Kidney
b) Liver
c) Lungs
d) Spleen

77) Excretion in the form of uric acid and urates
in birds is helpful in

a) Conserving body heat
b) Eliminating body heat
c) Conserving body water
d) Eliminating body water

78) A remarkable fall in blood pressure affects
the normal function of the kidneys reducing

a) Secretion of nitrogenous wastes
b) Renal filtration
c) Reabsorption of useful substances
d) Glomerular filtration

79) Normally what volume of water is lost by
plasma through the kidney in 24 hours?

a) 1000 ml
b) 1500 ml
c) 2000 ml
d) 2500 ml

80) Diuresis is the condition in which
a) The volume of excretion of urine increases
b) The volume of excretion of urine decreases
c) The kidney fails to excrete urine
d) The water balance of blood is disturbed

81) The urine of frogs under normal conditions
does not contain glucose because

a) The normal blood sugar is fructose
b) Glucose of the blood is not filtered
c) Glucose in the glomerular filtrate is reabsorbed in the uriniferous tubules
d) Glucose in the glomerular filtrate is converted into glycogen

82) In mammals, the kidneys are placed
asymmetrically in the abdominal cavity, one
being on the lower side. This is due to the
presence of the

a) Appendix and caecum
b) Rectum
c) Stomach
d) Spleen

83) The kidneys regulate the amount of
a) Enzymes
b) Hormones
c) Proteins
d) Salts

84) If the diameter of the afferent arteriole
is decreased and that of the efferent renal arteriole
increased, ultrafiltration will

a) Be faster
b) Be slower
c) Not take place
d) Take place in the same speed

85) Which one is not a body temperature regulating

a) Erection of the body hair
b) Shivering
c) Sweating
d) Urinating

86) Micturition is a process by which urine

a) Retained
b) Released
c) Reabsorbed
d) Formed

87) Micturition is possible only if the muscles
of the urinary bladder contract and the

a) Urethra contracts
b) Urethra relaxes
c) Ureter contracts
d) Ureter relaxes

88) The volume of urine is regulated by
a) Aldosterone
b) Aldosterone, ADH and testosterone
c) Aldosterone and ADH
d) ADH alone

89) Diuresis is a condition characterized

a) Increase in urine volume
b) Increased glucose excretion
c) Decreases in urine volume
d) Decrease in electrolyte balance

90) Urea is synthesized in the
a) Liver
b) Kidney
c) Alimentary canal
d) Urinary bladder

91) The glomeruli are limited in mammalian
kidneys to the

a) Cortex
b) Medulla
c) Pyramidal tissue
d) All over the kidney

92) The synthesis of urea in liver takes
place by the

a) Ornithine cycle
b) Nitrogen cycle
d) Glycolysis

93) Reabsorption of water in nephrons
is controlled by

a) STH
c) Oxytocin
d) Vasopressin

94) The hydrostatic pressure inside
the glomerular afferent arteriole

a) + 80 mm
b) +75 mm
c) +70 mm
d) +65 mm

95) A lower concentration of urea will
be found in the

a) Renal artery
b) Renal vein
c) Renal aorta
d) Portal vein

96) Ornithine, an amino acid, is found
a) As an intermediate of methionine metabolism
b) As an intermediate of the connective tissue
c) As a major fraction of the connective tissue
d) In bile salts

97) The ornithine cycle is related to
a) Respiration
b) Nutrition
c) Excretion
d) Digestion

98) The adrenal cortex produces
a) Aldosterone (hormone)
b) Pepsin (Enzyme)
c) Progesterone (hormone)
d) HCI acid

99) Which one of the following blood
vessel in mammals carries the least
amount of urea?

a) Pulmonary vein
b) Hepatic artery
c) Hepatic portal vein
d) Renal vein

100) Urea in mammals is formed in the
a) Kidney
b) Blood
c) Liver
d) Muscles


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