MCQ Questions for Class 11 Medical Biology Excretory Products And Their Elimination Quiz 4

Which of the following are osmoconformers?

0%
Hag fish
0%
Sharks
0%
Rays
0%
All of the above

Ureters act as Wolffian or urinogenital duct in

0%
Both male and female frog
0%
Male frog
0%
Human male
0%
Human female

Blood fraction remaining unchanged after circulation through kidney is

0%
Urea and uric acid
0%
Urea and proteins
0%
Urea and glucose
0%
Glucose and proteins

Which one is the most poisonous excretory substance?

0%
Uric acid
0%
Urea
0%
Ammonia
0%
Hippuric acid

Which one is the correct option for the structure and function of a nephron?

0%
Glomerulus- filtration
0%
Proximal convoluted tubule- reabsorption
0%
Both A and B
0%
Distal convoluted tubule- filtration

Urine of a human being suffering from diabetes inspidus is

0%
Tasteless and thick
0%
Tasteless and watery
0%
Sweet and thick
0%
Sweet and watery

Explanation

$\textbf{Correct answer: B}$

$\textbf{Option (A):}$

$\bullet$ Generally, the urine is tasteless and concentrated. This is because most of the glucose that enters the nephron is reabsorbed along with water which makes it concentrated.

$\textbf{Option (B):}$

$\bullet$ If a person suffers from Diabetes insipidus, then they have more loss of water.

$\bullet$ Reabsorption does not occur in a normal manner which is why the urine is diluted and tasteless.

$\textbf{Option (C):}$

$\bullet$ If a person suffers from Diabetes mellitus, there is the presence of sugar in urine even though the water reabsorption is normal.

$\bullet$ This is why the urine will be thick and sweet.

$\textbf{Option (D):}$

$\bullet$ If reabsorption of both glucose and water does not occur normally, the urine turns sweet and dilutes.

$\bullet$ Such a condition does not occur in diabetes insipidus.

Hence, the correct answer is option (B).

Maintenance of steady state by different systems in an organism can be referred to as _____.

0%
Homeostasis
0%
Peristalsis
0%
Necrosis
0%
Amoebiasis

In kidney glomerulus is involved in

0%
Reabsorption of salts
0%
Urine collection
0%
Urine formation by blood filtration
0%
All of the above

The blood vessel taking blood into Bowman's capsule is

0%
Afferent arteriole
0%
Efferent arteriole
0%
Renal vein
0%
Renal portal vein

Total filtrate formed in 24 hours in human kidney is

0%
1.8 litres
0%
8.0 litres
0%
18 litres
0%
180 litres

Characteristic smell of urine is due to ____.

0%
Urea
0%
Uric acid
0%
Urinod substance
0%
Nitrogen oxide

Explanation

Urinod substances with formula C $_6$ H $_8$ O extracted from urine by Dehn and Hartman are supposed to be the cause of the characteristic odor of urine.

So, the correct answer is option C.

One is found in blood not in Nephric filtrate

0%
Urea
0%
Glucose
0%
Amino acids
0%
Globulin

Uriniferous tubules occur in

0%
Stomach
0%
Testes
0%
Ovary
0%
Kidney

Parietal layer of Bowman's capsule is lined by

0%
Ciliated cuboidal epithelium
0%
Squamous epithelium
0%
Non-ciliated cuboidal epithelium
0%
Non-ciliated columnar epithelium

The mechanism of urine formation in nephron involves

0%
Ultrafiltration
0%
Reproduction
0%
Diffusion
0%
Osmosis

Dense pelage is characteristic of animal inhabiting (heavy hairy body)

0%
Cold Climate
0%
Warm climate
0%
Tropical climate
0%
Aquatic

Which one of the following does not filter out from blood to Bowman's capsule in glomerular ultrafiltration?

0%
Amino acids
0%
Polypeptide
0%
Glucose
0%
Fatty acids

Which one of the following is the simplest excretory organ?

0%
Alveolus
0%
Flame cell
0%
Nephridium
0%
Kidney

Excretory material are formed in

0%
Kidney
0%
Rectum
0%
Liver
0%
Every cell of the body

Explanation

Animals accumulate ammonia, urea, uric acid, carbon dioxide, water and ions like

N a^{+}

$Na^+$ ,

K^{+}

$K^+$ , Cl, phosphate, sulphate, etc., either by metabolic activities or by other means like excess ingestion. As metabolism is a characteristic feature of living cells. All the cells produce metabolic wastes. These substances have to be removed totally or partially. This process of removal of wastes from body is called excretion.

Glucose is taken back from glomerular filtrate through

0%
Active transport
0%
Passive transport
0%
Osmosis
0%
Diffusion

Which one of the following statements in regard to the excretion by the human kidney's is correct?

0%
Ascending limb of loop of Henle is impermeable to electrolytes
0%
Descending limb of loop of Henle is impermeable to water
0%
Distal convoluted tubule is incapable of reabsorbing HCO $_3^-$
0%
Nearly 99 percent of the glomerular filtrate is reabsorbed by the renal tubules

Which of the following is concerned with the formation of urea in rabbit?

0%
Blood
0%
Kidney
0%
Spleen
0%
Liver

The excretory organs in an earthworm are

0%
Ureters
0%
Stomata
0%
Nephrons
0%
Nephridia

Human urine as compared to human blood is normally

0%
Hypotonic
0%
Hypertonic
0%
Isotonic
0%
All of the above

In the kidney, the formation of urine involves the following processes

0%
Glomerular filtration, reabsorption and tubular secretion
0%
Reabsorption and filtration
0%
Secretion and absorption
0%
None of the above

Glomerular filtrate is

0%
Blood minus blood corpuscles and plasma protein
0%
Blood minus corpuscles
0%
Mixture of water, ammonia and corpuscles
0%
Urine

Marine telecosts, undergoing putrefaction, emit sharp characteristic foul odour, which is due to the production of

0%
Trimethylamine
0%
Hydrogen sulphide
0%
Ammonia
0%
Lactic acid

Match the following.
List 1 List 2
A. Loop of Henle    Carries blood the kidney
B. Rental artery    Area where a considerable amount of reabsorption takes place
C. Proximal convoluted tubule    Main area of secretion
D. Glomerulus    Filtration of blood
E. Distal convoluted tubule    Plays a role in concentration of urine

0%
A- 5, B- 1, C- 2, D- 4, E- 3
0%
A- 5, B- 1, C- 2, D- 3, E- 4
0%
A- 1, B- 5, C- 3, D- 4, E- 2
0%
A- 2, B- 1, C- 3, D- 5, D- 4

Explanation

A. A loop of Henle- The loop of Henle helps to produce concentrated urine, by reducing the volume of water and solutes within the urine but without changing the concentration by using a counter current multiplier.
B. Rental artery- Each kidney receives its blood supply from a single renal artery from dorsal aorta and is drained off by a single renal vein, which opens into the inferior vena cava.
C. Proximal convoluted tubule- The epithelial cells of this region are specialized for transport of salts and other substances from the lumen to the interstitial fluid. The tubule lumen has numerous microvilli (Brush Borders) which increase the surface area for absorption. Also near its basolateral surface, the mitochondria are concentrated, to allow reabsorption of salts by active transport.
D. Glomerulus- Within the bowman's capsule, a tuft of capillaries is present, which is called as the glomerulus. The diameter of afferent arteriole bringing the blood into the glomerulus is greater than efferent arteriole, which takes away the blood from glomerulus. This builds up pressure within the glomerulus resulting into ultrafiltration through the fenestrated endothelium of glomerular capillaries.
E. Distal convoluted tubule -

N a^{+}

${Na^{+}}$ ions and

H_{2} O

${H_{2}O}$ is reabsorbed under the influence of hormone in DCT along with which Urea, uric acid creatine hippuric secreted into the tubule.

So, the correct answer is option A.

Fresh water bony fishes maintain water balance by

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Excreting a hypotonic urine
0%
Excreting salt across their gills
0%
Drinking small amount of water
0%
Excreting wastes in the form of uric acid

Glomerular filtrate contains

0%
Blood without blood cells and proteins
0%
Plasma without sugar
0%
Blood with proteins but without cells
0%
Blood without urea

The most abundant, harmful and universal waste product of metabolism is

0%
CO $_{ 2 }$
0%
Uric acid
0%
H $_{ 2 }$ O
0%
C $_{ 2 }{ H }_{ 5 }OH$

The cavity of Bowman's capsule contain

0%
Urea, glycogen and water
0%
Urea and water
0%
Blood plasma except blood protein
0%
Concentrated blood

What causes glomerular filtration?

0%
High pressure
0%
Osmosis
0%
Diapedesis
0%
Dialysis

Functional unit in a kidney is

0%
Nephron
0%
Nephritis
0%
Neuron
0%
Loop of Henle

Which substance is in higher concentration in blood than in glomerular filtrate?

0%
Urea
0%
Plasma proteins
0%
Water
0%
Glucose

Part not belonging to uriniferous tubule is

0%
Glomerulus
0%
Henles loop
0%
Distal convoluted tubule
0%
Connecting tubule

Uriniferous tubules of a kidney are concerned with formation of

0%
Glucose
0%
Amino acids
0%
Hormones
0%
Urine

Animals release water into the atmosphere by _________ and _________.

0%
Respiration, excretion
0%
Digestion, sweating
0%
Excretion, transpiration
0%
Metabolism, breathing

The functional unit of the mammalian kidney is the _____.

0%
Nephron
0%
Neuron
0%
Kupffer cells
0%
Hepatocytes

Double-walled cup shaped structure present in nephron is known as _______.

0%
Glomerulus
0%
Proximal convoluted tubule
0%
Bowman's capsule
0%
Cortex

The gall bladder is involved in

0%
Synthesizing bile
0%
Storing and secreting bile
0%
Degrading bile
0%
Producing insulin

Which of the following organ is not related to excretion?

0%
Lungs
0%
Pancreas
0%
Liver
0%
Skin

A nephridium of an earthworm drains materials directly from the

0%
Gut
0%
Coelom
0%
Lymph
0%
Blood

A Malpighian tubule empties urine into the

0%
Gut
0%
Coelom
0%
Lymph
0%
Ureters

Kidneys are not only organs of excretion. Their work is supplemented by

0%
Liver
0%
Heart
0%
Large intestine
0%
Skin

Explanation

Kidney helps in the filtration of blood. Liver supplement the function of the kidney by the formation of urea by a cyclic process called as urea cycle of Ornithine cycle or Knely Henseleit cycle. The amino acids that are not needed in the body are deaminated by an enzyme oxidase, producing ammonia NH

_{3}

$_3$ . Ammonia, hung toxic, is quickly changed to urea.

So, the correct answer is option A.

The conversion of protein waste, the ammonia into urea occurs mainly in

0%
Kidney
0%
Lungs
0%
Liver
0%
Intestine

Explanation

Urea is formed in the liver by a cyclic process called as urea cycle of ornithine cycle or Knely Henseleit cycle. The amino acids that are not needed in the body are deaminated by an enzyme oxidase, producing ammonia NH

_{3}

$_3$ . Ammonia is toxic and quickly changes to urea.

So, the correct answer is option C.

In sponges, which structure is used for excretion?

0%
Contractile vocuole
0%
Flame cells
0%
Nephridia
0%
Osculum

Long loops of Henle correlate with

0%
More concentrated urine
0%
More dilute urine
0%
Urine hypotonic to the blood
0%
Urine isotonic to the blood

In insects, Malpighian tubules drain materials directly from the

0%
Gut
0%
Haemocoel
0%
Spider
0%
Jelly fish

A marine bony fish continuously

0%
Acquire water and get rid of salt
0%
Get rid of both water and salt
0%
Get rid of water and acquire salt
0%
Acquire both water and salt

CBSE Questions for Class 11 Medical Biology Excretory Products And Their Elimination Quiz 4 - MCQExams.com

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Practice Class 11 Medical Biology Quiz Questions and Answers

CBSE Questions for Class 11 Medical Biology Excretory Products And Their Elimination Quiz 4 - MCQExams.com

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Practice Class 11 Medical Biology Quiz Questions and Answers

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