Download NEET MCQs for NEET Biology: Excretory Products and Their Elimination
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Chapter-wise Objective Questions: Excretory Products and Their Elimination
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Multiple Choice Questions
(a) Kidney of fish
(b) Kidney covered by peritoneum on the ventral side
(c) Kidney covered by peritoneum on the dorsal side
(d) Kidney uncovered by peritoneum on the ventral side
Show Answer & Explanation
Answer: (d) Kidney uncovered by peritoneum on the ventral side
Explanation:
1. The kidneys lie behind the peritoneum, so the peritoneum covers only the front (ventral) side.
Teacher's Note:
1. Retro means behind.
(a) Water is lost due to evaporation
(b) Water is lost due to defaecation
(c) Water is lost in the form of urine
(d) Water is lost along with salts in the form of sweat
Show Answer & Explanation
Answer: (d) Water is lost along with salts in the form of sweat
Explanation:
1. The high temperature in deep mines causes heavy sweating with loss of water and salts.
Teacher's Note:
1. Sweating also removes some urea.
(a) Urea in tadpole and ammonia in adult frog
(b) Ammonia in tadpole and urea in adult frog
(c) Urea in both tadpole and adult frog
(d) Urea in tadpole and uric acid in adult frog
Show Answer & Explanation
Answer: (b) Ammonia in tadpole and urea in adult frog
Explanation:
1. Aquatic tadpoles excrete ammonia, but terrestrial adult frogs excrete urea.
Teacher's Note:
1. Excretion pattern changes with the habitat.
(a) Hepatic vein
(b) Renal vein
(c) Hepatic portal vein
(d) Renal artery
Show Answer & Explanation
Answer: (b) Renal vein
Explanation:
1. Urea is filtered out in the kidney, so blood in the renal vein has the least urea.
Teacher's Note:
1. Hepatic vein has the most urea.
(a) Amphibians
(b) Aves
(c) Tadpoles
(d) Reptiles
Show Answer & Explanation
Answer: (c) Tadpoles
Explanation:
1. Tadpoles are aquatic and ammonotelic. Adult amphibians are ureotelic.
Teacher's Note:
1. Aquatic animals excrete ammonia.
(a) Afferent arteriole
(b) Efferent arteriole
(c) Renal vein
(d) Renal portal vein
Show Answer & Explanation
Answer: (a) Afferent arteriole
Explanation:
1. The afferent arteriole brings blood to the glomerulus and the efferent arteriole carries blood away.
Teacher's Note:
1. The afferent is wider than the efferent.
(a) Respiration
(b) Excretion
(c) Digestion
(d) Nutrition
Show Answer & Explanation
Answer: (b) Excretion
Explanation:
1. The ornithine (urea) cycle in the liver converts ammonia to urea for excretion.
Teacher's Note:
1. It is also called the Krebs-Henseleit cycle.
(a) Citrulline and ammonia
(b) Ornithine and ammonia
(c) Ornithine and urea
(d) Citrulline and urea
Show Answer & Explanation
Answer: (c) Ornithine and urea
Explanation:
1. Arginase hydrolyses arginine into urea and ornithine, which re-enters the cycle.
Teacher's Note:
1. Ornithine is regenerated.
(a) Removal of substances not required by the body
(b) Removal of useless substances and substances present in excess
(c) Formation of substances having some role in the body
(d) All the above
Show Answer & Explanation
Answer: (b) Removal of useless substances and substances present in excess
Explanation:
1. Excretion removes metabolic wastes and substances present in excess.
Teacher's Note:
1. Egestion is removal of undigested food.
(a) Uterus
(b) Urethra
(c) Vestibule
(d) Ureter
Show Answer & Explanation
Answer: (b) Urethra
Explanation:
1. Urine is passed from the bladder through the urethra.
Teacher's Note:
1. Ureters bring urine to the bladder.
(a) Metanephric
(b) Mesonephric
(c) Pronephric
(d) Opisthonephric
Show Answer & Explanation
Answer: (a) Metanephric
Explanation:
1. The adult mammalian kidney is metanephric.
Teacher's Note:
1. Amphibians have mesonephric kidneys.
(a) Fats
(b) Amino acids
(c) Carbohydrates
(d) Uric acid
Show Answer & Explanation
Answer: (b) Amino acids
Explanation:
1. Deamination of amino acids releases ammonia, which the liver converts to urea.
Teacher's Note:
1. Fats and carbohydrates have no nitrogen.
(a) Terrestrial
(b) Amphibians
(c) Egg laying
(d) Aquatic
Show Answer & Explanation
Answer: (d) Aquatic
Explanation:
1. Ammonia is highly toxic and needs a lot of water, so it is excreted by aquatic animals.
Teacher's Note:
1. They are called ammonotelic.
(a) Amino acids
(b) Urea
(c) Uric acid
(d) Ammonia
Show Answer & Explanation
Answer: (b) Urea
Explanation:
1. Ureotelic means urea excreting.
Teacher's Note:
1. Mammals and adult amphibians are ureotelic.
(a) Salts
(b) Glucose
(c) Urea
(d) Ammonia
Show Answer & Explanation
Answer: (c) Urea
Explanation:
1. Mammals convert ammonia to the less toxic urea.
Teacher's Note:
1. Urea is excreted in urine and sweat.
(a) Medulla
(b) Cortex
(c) Pelvis
(d) Pyramid
Show Answer & Explanation
Answer: (b) Cortex
Explanation:
1. Malpighian corpuscles (glomerulus with Bowman's capsule) lie in the renal cortex.
Teacher's Note:
1. Loops of Henle lie in the medulla.
(a) Neck of nephron
(b) Collecting tube
(c) Proximal convoluted tubule
(d) All the above
Show Answer & Explanation
Answer: (c) Proximal convoluted tubule
Explanation:
1. The PCT is lined by cuboidal cells with microvilli that increase the area for reabsorption.
Teacher's Note:
1. The DCT lacks a brush border.
(a) Ammonia
(b) Uric acid
(c) Urea
(d) Both ammonia and urea
Show Answer & Explanation
Answer: (b) Uric acid
Explanation:
1. Cockroaches are uricotelic and excrete uric acid through Malpighian tubules.
Teacher's Note:
1. Insects conserve water.
(a) Stomach
(b) Pancreas
(c) Liver
(d) Oral cavity
Show Answer & Explanation
Answer: (c) Liver
Explanation:
1. Urea is synthesised in the liver by the ornithine cycle.
Teacher's Note:
1. The kidney then excretes it.
(a) Mammals and molluscs
(b) Birds and lizards
(c) Frog and cartilaginous fishes
(d) Insects and bony fishes
Show Answer & Explanation
Answer: (b) Birds and lizards
Explanation:
1. Birds, reptiles and insects are uricotelic.
Teacher's Note:
1. Bony fishes are ammonotelic.
(a) ATP synthesis
(b) Urea formation in spleen
(c) Urea formation in liver
(d) Urine formation in liver
Show Answer & Explanation
Answer: (c) Urea formation in liver
Explanation:
1. The cycle forms urea in the liver.
Teacher's Note:
1. The urine is formed in the kidney.
(a) Stomach
(b) Testes
(c) Ovary
(d) Kidney
Show Answer & Explanation
Answer: (d) Kidney
Explanation:
1. The uriniferous tubule is the nephron in the kidney.
Teacher's Note:
1. Seminiferous tubules occur in testes.
(a) Heart
(b) Spleen
(c) Liver
(d) Brain
Show Answer & Explanation
Answer: (c) Liver
Explanation:
1. The liver has the enzymes of the ornithine cycle.
Teacher's Note:
1. Urea is then carried to the kidney.
(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
Show Answer & Explanation
Answer: (c) Left kidney at a higher level than the right one
Explanation:
1. The right kidney is pushed down by the liver, so the left kidney is slightly higher.
Teacher's Note:
1. They lie between the last thoracic and 3rd lumbar vertebrae.
(a) Posterior part of the alimentary canal
(b) PCT
(c) Loop of Henle
(d) DCT
Show Answer & Explanation
Answer: (c) Loop of Henle
Explanation:
1. The vasa recta run parallel to the loop of Henle in the medulla and help in the countercurrent mechanism.
Teacher's Note:
1. Peritubular capillaries surround the PCT and DCT.
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NEET Biology Excretory Products and Their Elimination Objective Test Questions
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FAQs
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