81. A terrestrial animal must be able to

A excrete large amounts of water in urine
B conserve water
C actively pump salts out through the skin
D excrete large amounts of salts in urine
Answer :   conserve water
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82. The two kidneys lie in man

A At the level of ovaries
B At the same level
C Left kidney at a higher level than the right one
D Right kidney at a higher level than the left one
Answer :   Left kidney at a higher level than the right one
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83. Excretion in the form of uric acid and urates in birds is helpful in

A Conserving body heat
B Elimination excess water
C Conserving body water
D Eliminating body water
Answer :   Conserving body water
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84. What for the ascentding limb of Loop of Henle is permeable? MP PMT 1997, JIPMER

A Glucose
B NH3
C Na+
D Water
Answer :   Na+
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85. Which of the following is concerned with the formation of urea in rabbit

A Blood
B Kidney
C Spleen
D Liver
Answer :   Liver
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86. Henle's loop is located in

A Cortex
B Medulla
C Pelvis
D Renal Colums
Answer :   Medulla
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87. The presence of arginase confirms that

A Urea cycle is operating
B Urea cycle may be operating
C Arginine is being converted into ornithine
D Arginine is being converted into citrulline
Answer :   Arginine is being converted into ornithine
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88. The efferent and efferent vessels are

A Arterial in nature
B Venous in nature
C One is arterial and the other is venous
D None of the above
Answer :   Arterial in nature
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89. Human urine is usually acidic because :

A excreted plasma proteins are acidic
B potassium and sodium exchange generates acidity
C hydrogen ions are actively secreted into the filtrate
D the sodium transporter exchanges one hydrogen ion for each sodium ion, in peritubular capillaries
Answer :   hydrogen ions are actively secreted into the filtrate
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90. In Hydra waste material of food digestion and nitrogenous waste material removed from

A mouth and body wall
B mouth and tentacles
C mouth and nematocyst
D body wall and tentacles
Answer :   mouth and body wall
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