CBSE Questions for Class 11 Medical Biology Excretory Products And Their Elimination Quiz 1 - MCQExams.com

Uric acid is formed in human from
  • Purines
  • Proteins
  • Glucose
  • Pyrimidines
The Malpighian corpuscle lies in the

  • Medulla
  • Liver
  • Cortex
  • Pelvis
In birds, excretion of nitrogenous wastes, mainly as uric acid, is helpful for
  • eliminating excess body water
  • conserving body water
  • eliminating excess body heat
  • eliminating excess sugar
The functional unit of the kidney where the urine is actually produced is
  • Glomerulus
  • Bladder
  • Nephron
  • Neuron
Flame cells are excretory organs of
  • Prawn
  • Planaria
  • Silver fish
  • Hydra
In which one of the following organisms its excretory organs are correctly stated?
  • Frog - kidneys, skin and buccal epithelium
  • Humans - kidneys, sebaceous glands and tear glands
  • Earthworm - pharyngeal, integumentary and septal nephridia
  • Cockroach - malpighian tubules and enteric caeca
Human urine is usually acidic because
  • Hydrogen ions are actively secreted into the filtrate.
  • The sodium transporter exchanges one hydrogen ion for each sodium ion in peritubular capillaries.
  • Excreted plasma proteins are acidic.
  • Potassium and sodium exchange generates acidity.
Which of the following statements is correct?
  • The descending limb of loop is Henle is permeable to electrolytes.
  • The ascending limb of loop of Henle is impermeable to water.
  • The descending limb of loop of Henle is impermeable to water.
  • The ascending limb of loop of Henle is permeable to water.
Which part of the nephron is impermeable to water?
  • Proximal convoluted tubule
  • Distal convoluted tubule
  • Ascending limb of loop of Henle
  • Descending limb of loop of Henle
  • Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
  • Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
  • Assertion is correct but Reason is incorrect.
  • Both Assertion and Reason are incorrect.
Duct of Bellini opens on

  • Collecting duct
  • Ureter
  • Renal papilla
  • DCT
The vessel leading blood (containing nitrogenous waste) into the Bowman's capsule is known as
  • Afferent arteriole
  • Efferent arteriole
  • Renal artery
  • Renal vein
Marine teleost fishes excrete:
  • Uric acid
  • Ammonia
  • Urea
  • None of these
Excretion means
  • Removal of useless substances and substances present in excess
  • Formation of those substances which have some role in the body
  • Removal of such substances which have never been part of the body
  • All of the above
Which of the following is a metabolic waste of protein metabolism?
  • NH$$_{3}$$, urea and CO$$_{2}$$
  • Urea, Oxygen and N$$_{2}$$
  • Urea, ammonia and alanine
  • Urea, ammonia and creatinine
Human body loses water by
  • Sweating
  • Excretion
  • Breathing
  • All of the above
Loop of Henle is associated with
  • Excretory system
  • Respiratory system
  • Reproductive system
  • Digestive system
Nitrogenous wastes can be removed from the body by
  • Urinary system
  • Lymphatic system
  • Circulatory system
  • Respiratory system
  • Integumentary system
Excretory products by kidney is
  • Ammonia
  • $$CO_{2}$$
  • Urine
  • Sweat
In kidney, glomerulus is involved in
  • Reabsorption of salts
  • Urine collection
  • Urine formation by blood filtration
  • All of the above
The kidneys are located
  • Within the coelom
  • Near the buccal cavity
  • Near the heart
  • Outside the coelom
The Bowman's capsule functions as a
  • Filter
  • Suction pump
  • Sponge
  • All of the above
Glycosuria is the term used for?
  • Loss of glucose in urine
  • Loss of blood in the urine
  • Loss of salts in the urine
  • Loss of albumin in urine
Proximal and distal convoluted tubules are parts of
  • Seminiferous tubules
  • Nephron
  • Oviduct
  • Vas deferens
In Annelids, excretory organs are
  • Nephridia
  • Malpighian tubules
  • Green glands
  • Kidneys
The smallest functional unit of kidney is
  • Nephron
  • Collecting tube
  • Glomerulus
  • Bowman's capsule
The term homeostasis was coined by
  • Whittaker
  • Watt
  • Elton
  • Cannon
Functional kidney of mammals is
  • Metanephros type
  • Archinephros type
  • Ophisthonephros type
  • Pronephros type
Excretion is removal of
  • Carbon dioxide
  • Harmful and useless ingredients
  • Extra water
  • Metabolic waste products
Marcello Malpighi after whom Malpighian tubules are named was born in
  • Germany
  • Australia
  • Austria
  • Italy
Functional unit of kidney is
  • Neuron
  • Axon
  • Glomerulus
  • Nephron
The functional unit of kidney is neuron.
  • True
  • False
Which has thin and thick segments?
  • DL of loop of Henle
  • AL of loop of Henle
  • PCT
  • DCT
Find out the incorrect statement 
  • Ammonia is the most toxic form and requires large amount of water for its elimination
  • Kidneys do not play any important role in ammonia removal
  • Human kidneys can only produce hypertonic urine nearly five timesconcentrated than the initial filtrate
  • Urea may be retained in the kidney matrix of some animals to maintain the desired acidity.
Which of the following is not correct with respect to human kidney?
  • The peripheral region is called cortex and central is called medulla
  • Malpighian corpuscles are present in the cortical region
  • Blood enters glomerulus through efferent arterioles
  • The concave part of kidney is called hilus
When we are in a hot room, we sweat profusely. It is a _________ means of maintaining homeostasis. 
  • morphological
  • physiological
  • behavioural
  • none of these
Sodium depletion occurs in excessive sweating, and cannot be corrected by drinking water alone. When uncorrected, it may lead to
  • Swelling of ankles and feet
  • Increase of urea in blood
  • Muscle cramps, loss of energy, fatigue and faintness
  • Renal failure
On a hot day if you are sweating, you will feel cooler than on a cooler moist day. This is because
  • The evaporation of sweat on a cooler moist day raises the body temperature
  • On a cot moist day you lose less of energy
  • There is loss of energy when you sweat
  • The evaporation of sweat on a hot day causes more cooling
The $$pH$$ value of urine is ______.
  • 5.0
  • 6.0
  • 7.0
  • 8.0
Which is the main excretory organ in human beings?
  • Kidneys
  • Skin
  • Lungs
  • Heart
Uric acid forms in body by
  • Phospholipid
  • Glucose
  • DNA
  • RNA
The region of the nephron found in the renal medulla is
  • Malpighian corpuscle
  • Proximal convoluted tubule
  • Distal convoluted tubule
  • Henle's loop
In the kidney, glucose is mainly absorbed in
  • Loop of Henle
  • Proximal convoluted tubules
  • Distal convoluted tubules
  • Bowman's capsule
Ultrafiltration takes place in
  • Blood capillaries
  • Tissue fluid
  • Glomerulus
  • Urinary bladder
Living steady state has a self regulatory mechanism called as
  • Homeostasis
  • Feedback mechanism
  • Homozygosity
  • None of these
Which of the following is a nitrogenous waste?
  • Creatinine
  • Creatine
  • Guanine
  • All of the above
Which one of the following groups of structures or organs have
similar function?
  • Typhlosole in earthworm, interstinal vili in rat and contractile vacuole in Amoeba
  • Nephridia in earthworm, malpighian tubules in cockroach and urinary tubules in rat
  • Antennae of cockroach, tympanum of frog and clitellum of earthworm
  • Incisors of rat, gizzard (proventriculus ) of cockroach and tube feet of starfish
Transitional epithelium is found in

  • Lungs
  • Liver
  • Urinary bladder
  • Stomach
The glomerular filtrate generally consists of
  • Urea, sodium chloride, fibrinogen and water
  • Glucose, amino acids, urea, oxytocin and calcitonin
  • Urea, salts and water
  • Both A and B
Bowman's glands are located in the
  • Proximal end of coniferous tubules
  • Anterior pituitary
  • Female reproductive system of cockroach
  • Olfactory epithelium of nose
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