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CBSE Questions for Class 11 Medical Biology Excretory Products And Their Elimination Quiz 11 - MCQExams.com
CBSE
Class 11 Medical Biology
Excretory Products And Their Elimination
Quiz 11
Which of the following is not found in renal cortex;
1. Henle's loop
2. Vasa recta
Glomerulus
4. Bowman capsule
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0%
1, 2 and 3
0%
1 and 2
0%
2 and 4
0%
1 and 3
Explanation
The renal cortex is the outer portion of the kidney between the renal capsule and the renal medulla. It contains the renal corpuscles and the renal tubules except for parts of the loop of Henle which descend into the renal medulla.
Glomerulus &
Bowman capsule are parts of the nephron.
So the answer is '
1 and 2'.
Organs of excretion in annelids are
Report Question
0%
Suckers
0%
Nephridia
0%
Lungs
0%
Kidney
Explanation
Organs of excretion in annelids are nephridia. The nephridium is an invertebrate organ which occurs in pairs and performs a function similar to the vertebrate kidney. Nephridia remove metabolic wastes from an animal's body.
So, the correct answer is 'Nephridia'.
Which one of the following is correctly matched?
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0%
Wings of honey bee and crow - Homologous
0%
Thorn of
Bougainvillea
and tendrils of
Cucurbita
- Analogous
0%
Nephridia of earthworm and malphighian tubules of cockroach - Excretory
0%
Nictitating membrane and blindspot in human eye - Vestigial
Explanation
Homologous organs are the organ which has the same origin but performs different functions. Wings of honey bee and crow are the analogous as they perform the same function. Where thorn of
Bougainvillea
and tendrils of
Cucurbita
are the homologous organs. Nictitating membrane is the vestigial organ of the human eye but not the blind spot. Whereas nephridia is the excretory organ of earthworm and malpighian tubule of the cockroach. Thus, the correct answer is option C.
Non-threshold substance among the following is
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0%
Glucose
0%
Urea
0%
Creatinine
0%
Amino acids
Explanation
The substance which is not reabsorbed and excreted entirely from the body is called as Nonthreshold substance. For example, creatinine is a non-threshold substance.
So, the correct answer is 'Creatinine'.
Which of the following phenomena does not play a significant role in the maintenance of homeostasis in an ecosystem?
Report Question
0%
Carrying capacity
0%
Biotic potential
0%
Self regulation
0%
Feed back
Explanation
A. Carrying capacity is the maximum population size that an ecosystem can sustain.
B. Biotic potential is the maximum reproductive capacity of organisms of a population under optimum environmental conditions.
C. Self-regulation is the ability of an organism to respond to the ongoing processes in it without the interference of any external factor.
D. Feed back mechanism regulates the synthesis and inhibition of a particular product in an organism.
Hence, carrying capacity does not play a significant role in the maintenance of homeostasis in an ecosystem.
So, the correct answer is 'Carrying capacity'.
Glomerular filtration is a
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0%
Selective process, and uses glomerular capillary blood pressure
0%
Non-selective process and uses capsular hydrostatic pressure
0%
Selective process and occurs actively with the expenditure of energy
0%
Non-selective process and uses glornerular capillary blood pressure
Explanation
The first step in urine formation is the filtration of blood, which is carried out by the glomerulus and is called glomerular filtration. Urine formation begins with glomerular filtration, which is a non-selective process in which fluids and solutes are forced through a membrane by capsular hydrostatic pressure.
So, the correct answer 'Option B'.
Glomerular filtrate is similar to blood plasma, except
Report Question
0%
Glucose
0%
Proteins
0%
Electrolytes
0%
Urea
Explanation
Blood is filtered by the kidneys on an average 1100-1200 ml per minute. The glomerular blood pressure causes filtration of blood through three layers -
1. Endothelium of glomerular blood vessels
2. Epithelium of bownman's capsule
3. Basement membrane between these two layers
These threee structures form the filtration membrane.
The blood is filtered so finely through these membranes, that almost all the constituents of the plasma except the proteins pass into the lumen of the bownman's capsule. Hence, this process is known as ultrafiltration.
So, the correct answer is 'Proteins'.
Which of the following is the correct order of processes that occur in urine formation?
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0%
Glomerular filtration $$\rightarrow $$ Secretion $$\rightarrow $$ Reabsorption
0%
Secretion $$\rightarrow $$ Glomerular filtration $$\rightarrow $$ Reabsorption
0%
Glomerular filtration $$\rightarrow $$ Reabsorption $$\rightarrow $$ Secretion
0%
Secretion $$\rightarrow $$ Reabsorption $$\rightarrow $$ Glomerular filtration
Explanation
The process of urine formation involves three steps:
Glomerular filtration: It takes place through glomerulus & glomerulus capsule through the semipermeable membrane.
Reabsorption: Most of the reabsorption takes place in proximal convoluted tubule, whose walls are lined by microvilli to increase surface area for absorption.
Secretion: Tubular secretion is the process by which the substances are transported from the blood into renal tubule.
Hence the correct order is 'Glomerular filtration $$\rightarrow$$ Reabsorption
$$\rightarrow$$
Secretion'.
Ultrafiltrate generated by the glomerulus has all the constituents of the blood plasma except
Report Question
0%
Protein
0%
RBC
0%
WBC
0%
All of the above
Explanation
Ultrafiltrate generated by the glomerulus has all the constituents of the blood plasma except Proteins because proteins are relatively larger in physical size and cannot pass through the minute pores called filtration slits or slit pores present in the epithelial layer of Bowman's capsule.
So, the correct answer is 'Protein'.
Collecting duct of nephron extends kidney from cortex to
Report Question
0%
Capsule region
0%
Medulla
0%
Hilus
0%
Ureter
Explanation
A. Capsule region or renal capsule is a fibrous layer that surrounds the kidney.
B. Medulla is the innermost part of the kidney.
C. Hilus or hilum is a deep notch or a cavity present in the medial portion of kidney.
D. Ureters are the ducts through which urine passes from kidneys to the bladder.
Collecting ducts are the last parts of nephrons and extends from cortex to the medulla in the kidneys.
So, the correct answer is 'Medulla'.
Kidney of adult reptile is
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0%
Metanephric
0%
Mesonephric
0%
Pronephric
0%
All of the above
Explanation
On the basis of development, there three types of kidneys as pronephric kidney, mesonephric kidney and the metanephric kidney.
A. The metanephric kidney is present in the reptiles, birds, and mammals. In these types, the glomeruli are well developed.
B. The mesonephric kidney is present in adult fishes and amphibians. They have internal glomeruli enclosed in capsules forming Malpighian bodies.
C. The pronephric kidney occurs in jawless fishes and represents the earliest stage.
Hence, the correct answer is 'Metanephric'
Which of the following play a significant role in the maintenance of high osmolarity of cortex interstitial fluid ?
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0%
Henle's loop
0%
DCT
0%
PCT
0%
none of these
Explanation
A. Henle's loop is a U-shaped that plays a significant role in maintaining high osmolarity of cortex and medullary interstitial fluid.
B. DCT (Distal Convoluted Tubule) is situated in the cortex region of the kidney. In this tubule, conditional resorption of sodium ions, water, and bicarbonate ions takes place.
C. PCT (Proximal Convoluted Tubule) is lined by a layer of brush border cuboidal epithelial cells so that the surface area for reabsorption is increased. This segment helps to maintain the pH and ionic balance of body fluids.
So, the correct answer is 'Henle's loop'.
What is the function of Bowman's capsule and Glomerulus?
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0%
Filtration of blood
0%
Reabsorption of ions from blood
0%
Reabsorption of hormones from blood
0%
Reabsorption of water from blood
Explanation
Bowman's capsule is a cup-like sack at the beginning of the tubular component of a nephron in the mammalian kidney that performs the first step in the filtration of blood to form urine.
The glomerulus is a tuft of small blood vessels called capillaries located within Bowman's capsule within the kidney. It helps in the filtration of blood.
So, the correct answer is 'Filtration of blood'.
Removal of proximal convoluted tubule from the nephron will result in
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0%
No change in quality and quantity of urine
0%
No urine formation
0%
More diluted urine
0%
More concentrated urine
Explanation
Correct Answer :C
Explanation :
The kidney has
proximal convulated tubule
which is responsible for the absorption of the material such as glucose, salts, proteins and ions such as
potassium and sodium.
If the proximal convulated tubule will be removed, it will result in malfunctioning of the kidney.
In absence of absorption, the urine will be more
diluted .
Hence, the correct answer is C
. More diluted urine
"Homeostasis" term was proposed by
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0%
Claude Bernard
0%
Walter cannon
0%
Maroello Malopighi
0%
Henle
Explanation
Homeostasis is the process of maintaining a constant and stable internal environment by an organism. This term was first described in 1865 by Claude Bernard and coined by Walter Bradford Cannon in 1930. The word is derived from Greek where 'home' means 'similar' and 'stasis' means 'stable'. So, the correct answer is "Walter Cannon'.
The bunch of blood capillaries of nephron is called ..............
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0%
Bowman's capsule
0%
PCT
0%
DCT
0%
None of the above
Explanation
Each nephron consists of a Malphigian body, proximal and distal convoluted tubule and a collecting duct. The Malphigian body contains a cup like structure, the Bowman's capsule and a tuft or bunch of capillaries called the glomerulus
So, correct answer is 'None of the above'
The net pressure gradient that causes the fluid to filter out of the glomeruli into the capsule is
Report Question
0%
50 mmHg
0%
75 mmHg
0%
20 mmHg
0%
30 mmHg
Explanation
Correct Answer : C
Explanation :
In the kidney, the fluid to be filtered out of the
glomeruli into the capsule
, a pressure gradient is required.
The net pressure gradient is
20mm Hg.
One-fifth of the plasma fluid is filtered out of the
Bowman's capsule
. The filtration rate is 10-15mm Hg.
Hence, the correct option is
C. 20mm Hg.
The two main parts of nephron are
Report Question
0%
Bowman's capsule and renal tubule
0%
Glomerulus and renal tubule
0%
Bowman's capsule and glomerulus
0%
Glomerulus and malpighian body
Explanation
A) Bowman's capsule is a cup-like structure at the beginning of the tubular component of a nephron. Renal tubules are long, fine, convoluted tubules which deliver urine from the glomeruli to the renal pelvis.
B) The glomerulus is a tuft of capillaries located inside the Bowman's capsule.
C) Bowman's capsule and glomerulus are a part of the nephron.
D) The glomerulus along with the Bowman's capsule is called as the malpighian body.
So the correct answer is 'Glomerulus and renal tubule'.
What is the excretory unit in human being?
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0%
Neuron
0%
Nephron
0%
Liver
0%
Kidney
Collecting tubule opens in which part of the kidney?
Report Question
0%
Outer cortex
0%
Inner medulla
0%
Renal pelvis
0%
Ureter
Explanation
Collecting tubules of the nephrons are responsible for the collection of the urinal filtrate from the distal convoluted tubule and pass it to the renal pelvis of the kidney. From the renal pelvis, the urine passes on to the ureters.
Hence, the correct answer is 'Renal pelvis'
Find out the incorrect statement :
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Ammonia is the most toxic form and needs a lot of water for its elimination.
0%
Kidneys do not play any significant role in ammonia removal.
0%
Human kidneys can only produce hypertonic urine nearly five times concentrated than the initial filtrate.
0%
Urea may be retained in the kidney matrix of some animals to maintain a desired acidity.
Explanation
A) Ammonia is the most toxic form and requires a large amount of water for its elimination this is the reason it is necessary to eliminate it from the body. B)Kidneys do not play an important role in ammonia removal as it is converted into urea in the liver and then removed by the kidneys. C) Human kidneys can only produce hypertonic urine nearly five times concentrated than the initial to maintain the water level inside the body. D)Urea may be retained in the kidney matrix of some animals to maintain the desired osmolarity as chemical changes occur which leads to an adverse effect on the body. So the correct option is 'Urea may be retained in the kidney matrix of some animals to maintain the desired acidity'.
Characteristic feature of Malpighian body is that it consists of
Report Question
0%
Bowman's capsule only
0%
Bowman's capsule and ciliated tubule only
0%
Glomerulus and Bowman's capsule
0%
Consists of ciliated funnels
Explanation
Malpighian body is a structure present at the beginning of a nephron which consists of a glomerulus and is surrounded by the Bowman's capsule.
The Bowman's capsule
expand
at the end of the nephron and forms a cup shape.
The glomerulus is a multiple branching of the afferent arteriole before rejoining to the efferent arteriole.
Together the Bowman's capsule and the glomerulus are known as the Malpighian body. So, the correct answer is '
Glomerulus and Bowman's capsule'.
Characteristic smell of urine is due to
Report Question
0%
Urea
0%
Uric acid
0%
Urinod substancce
0%
Pus
Explanation
95% of urine is water and 5% is organic molecules.
Urea is one such organic molecule.
It is also known as carbamide.
It is derived from ammonia and produced by the deamination of amino acids.
The amount of urea present in the urine indicates the quantity of dietary protein in the diet.
The characteristic smell of urine is due to the presence of urea in them which is actually derived from ammonia.
So, the correct answer is 'Urea'.
Which is not correctly matched?
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0%
Henle's loop$$\rightarrow$$ Concentration of urine
0%
Distal convoluted tubules $$\rightarrow $$ Aborption of glucose and amino acid
0%
Brownan's capsule $$\rightarrow $$ Glomerilar filtration
0%
Collecting duct $$\rightarrow $$ Maintain interstitial osmolarity
Explanation
A) Henle's loop is a U-shaped portion of the tubule that conducts urine within each nephron.
It helps to reabsorb water and sodium chloride from the urine.
Thus, it creates a concentrated urine for excretion.
B) D
istal convoluted tubule is the portion of kidney nephron between the loop of Henle and the collecting tubule.
It reabsorbs calcium, sodium, and chloride and regulates the pH of urine by secreting protons and absorbing bicarbonate.
C) Bowman's capsule is a cup-like sack at the beginning of the tubular component of a nephron.
The glomerulus filters blood and produces glomerular filtrate which contains water, glucose, salts and urea.
D) C
ollecting duct is the last part of a long, twisting tube that collects urine from the nephrons.
It carries these filtrate through the renal medulla and the renal medullary interstitium osmolarity sets the upper limit for urine.
The water permeability of the collecting duct determines the extent to which this potential is achieved.
The correct answer is OPTION B.
Most of the homeostatic mechanisms operate through feed back mechanism. The best example is illustrated by
Report Question
0%
Hormones
0%
Enzymes
0%
Vitamins
0%
Ribozymes
Explanation
Hormones provide the best feedback mechanism. There are positive feedback mechanism in which the hormone stimulates the production of itself example estrogen before ovulation.
There also are negative feedback mechanism where a hormone inhibits its own production example thyroid hormone ( $$T_4$$ ).
Enzymes, vitamins and Ribozymes do not show such feedback mechanism.
So the correct option is ' Hormones'.
In a comparison of amounts of urea in human urine, the largest amount of urea would be found with a diet very rich in
Report Question
0%
Animal fat
0%
Simple carbohydrates (sucrose)
0%
Complex carbohydrates (starches)
0%
Protein
Explanation
When we are taking a protein-rich diet, the highest amount of urea can be found in urine. This is simply because
urea is a by-product of protein metabolism.
So, the correct answer is 'Protein'.
Read the following statements carefully and choose which is not incorrect :-
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0%
On an average $$1100-1200 ml$$ of blood is filtered by one kidney per minute.
0%
Both kidneys can filter roughly $$1/5^{th}$$ of the blood pumped out by each ventricle of the heart in a second.
0%
$$GFR$$ in a healthy individual is approximately $$125 ml/min$$ .
0%
Glucose is absent in Glomerular filtrate.
Explanation
Around 180 litres of liquid are sifted by the kidneys consistently. Subsequently, the whole plasma volume (around 3 litres) is separated 60 times each day! Filtration is fundamentally determined by water-powered weight (circulatory strain) in the vessels of the glomerulus.
So, the correct option is '
Both kidneys can filter roughly 1/5th of the blood pumped out by each ventricle of the heart in a second'.
Choose the most appropriate answer;
Kidneys are excretory organs in
Report Question
0%
All chordates
0%
Only mammals
0%
Mammals, Reptiles and Amphibians
0%
Mammals, Reptiles and Birds
Explanation
Name of the organism
Excretory organ
Mammals
kidneys
Reptiles
Kidneys
Amphibians
Kidneys
Birds
Kidneys
So, the correct answer is ' All chordates'
The filtrate from glomerulus contains
Report Question
0%
Urea uric acid
0%
Urea ,uric acid $${ H }_{ 2 }O$$
0%
$${ H }_{ 2 }O$$, urea, $$H^+$$
0%
Urea, glucose and NH$$_3$$
Explanation
Glomerular
filtration is the first step in urine formation. The blood plasma is filtered through the glomerular capillaries into Bowman's capsule. The filtrate formed then enters the renal tubule, of the nephron. This filtrate from glomerulus contains water and soluble substances such as urea, glucose and NH$$_3$$.
So, the correct answer is 'Urea, glucose and NH$$_3$$'.
Filteration pressure in human kidneys is about
Report Question
0%
$$10$$mm of Hg
0%
$$70$$mm of Hg
0%
$$45$$mm of Hg
0%
$$55$$mm of Hg
Explanation
The net driving force which pushes fluid into tissue spaces and out of vascular sites; the net result between capillary osmotic
pressure
and intravascular hydrostatic
pressure
.
filtration
slits. openings in the glomerular corpuscle which are part of the
filtration
process in the renal glomerulus.
Filtration pressure in human kidneys is about '10mm of Hg'.
So, the correct option is '10nm of Hg'.
The excretory product of fresh water fishes is _____.
Report Question
0%
Urea
0%
Uric acid
0%
Ammonia
0%
Guanine
Explanation
The excretory product of freshwater fishes is 'ammonia'.
Mark the inappropriate term w.r.t the glomerural filtration
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0%
Non-selective
0%
Passive process
0%
Active process
0%
Occurs due to pressure difference
The primary threshold substance are............... .
Report Question
0%
Urea and uric acid
0%
Potassium and calcium
0%
Glucose and amino acids
0%
Plasma proteins
Explanation
A substance present in blood is filtered through kidneys. Depending on the concentration they are divided as follows, High threshold substances(such as chlorides or glucose), Low threshold substances (such as phosphates or urea). No-threshold substances (such as creatinine sulfate). The primary threshold substance is Urea and uric acid.
So the correct option is 'Urea and uric acid.'
The most advanced kidneys in which loop of Henle is present are called metanephric kidneys,these are in all;except one
Report Question
0%
Amphibians
0%
Reptiles
0%
Birds
0%
Mammals
Explanation
Amphibians have mesonephric type of kidneys which are primitive compared to metanephric kidneys.
Mesonephric kidneys do not have nephrons but their nephrons do not contain a loop of Henle.
So, the correct option is 'Amphibians'.
Which stage of the urine formation occurs under high pressure of blood?
Report Question
0%
Ultrafiltration
0%
Reabsorption
0%
Absorption
0%
Adsorption
Explanation
Ultrafiltration takes place in Glomerulus of the Bowman's capsule of the nephron. The glomerulus consist of a tuft of capillaries, branched out of incoming or Afferent arteriole and outgoing Efferent arteriole
The diameter of the afferent arteriole is greater than that of the efferent arteriole and therefore blood flows under high pressure, where most of the substances and a large amount of water is filtered into the Bowman's capsule of the nephron, this filterate is called the ultrafiltrate and the process is called ultrafiltration
So, the correct answer is 'Ultrafiltration'
Blood vessel entering into a glomerulus is called
Report Question
0%
Afferent arteriole
0%
Efferent arteriole
0%
Renal artery
0%
Renal vein
Explanation
The blood enters into the glomerulus via an artery called the afferent arteriole. This vessel brings the blood into the kidney for the removal of excess fluids and salts.
So, the correct answer is '
Afferent arteriole'.
Renal calculi is made up of
Report Question
0%
Uric, acid, cholestrol
0%
Calcium oxalate, cystine
0%
Cholesterol, calcium
0%
Calcium phosphate & cholesterol
Explanation
Renal calculi is a medical term used to describe kidney stones. They are hard deposits that form in the urine that are made up of minerals and salt acids like calcium oxalate and cysteine.
So the correct answer is 'Calcium oxalate, cystine'.
Select the correct statements with reference to Pheretima(excretory system):-
A)Nephridia help in excretion and osmoregulation.
B) Septal nephridia collect the wastes from coelomic fluid with the help of nephrestomes
C) Integumentary nephridia discharge waste materials to the outer body surface through the nephridiopores.
D) Septal nephridia and pharyngeal nephridia discharge wastes into the lumen of gut.
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0%
A,B,C
0%
B,C,D
0%
A,C,D
0%
A,B,C,D
Duct of Bellini is found in
Report Question
0%
Pancreas
0%
Salivary gland
0%
Medulla of mammalian kidney
0%
Liver
Explanation
The duct of Bellini or papillary duct is found in the medulla of the mammalian kidney. They receive renal filtrate and empty into the minor calyx. So, the correct answer is 'medulla of mammalian kidney'.
Use the following diagram to complete the statement about the human nephron-
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0%
The composition of the filtrate would be must like plasma in the tubule next to the
0%
The urine would be most concentrated in the collecting duct next to letter
0%
Most of the glomerular filtrate is reabsorbed into pentubular capillary next to the
0%
Conducting of urine to pelvis of the kidney from the structure next to the letter
0%
Most water is reabsorbed by the structure next to the letter
Explanation
A- Bowman's capsule
B- Proximal Convoluted Tubule
C- Loop of Henle
D- Distal Convoluted Tubule.
E- Collecting duct.
So, the correct option is 'The composition of filterate would be must like plasma in the tubule next'.
Which terms for P, Q, R, S, T, U, and V will make the following paragraph true?
The human excretory system consists of kidneys, ureters, __P__ and __Q__. The __R__ brings the dirty blood into kidneys. Kidneys remove the poisonous substances urea, salt and extra water from the body. The cleaned blood is carried away from the kidneys by __S__. __T__ is the tube that carries urine from the kidney to the __U__. The urine collected in the bladder is passed out of the body through the __V__.
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0%
P- bladder ; Q-urethra; R_renal artery; S-renal vein; T-ureters; U-bladder; V-urethra
0%
P- bladder ; Q-urethra; R_renal vein; S-renal artery; T-ureters; U-bladder; V-urethra
0%
P- bladder ; Q-urethra; R_renal artery; S-venacava; T-ureters; U-bladder; V-urethra
0%
None of these
Explanation
So, the correct option is '
P- bladder ; Q-urethra; R_renal artery; S-renal vein; T-ureters; U-bladder; V-urethra
'.
Write true or false for the following statements:
The chemical process involved in the removal of harmful metabolic wastes from the body is called excretion.
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0%
True
0%
False
Explanation
The body uses various chemical metabolic processes to convert the harmful products produced or toxins into less harmful ones or into products that can be reutilized by the body then, the rest is eliminated out of the body through excretory mechanism. Therefore, excretory mechanism is a physical process.
So, the given statement is 'False'
Waste product of adenine and guanine metabolism are excreted by man as?
Report Question
0%
Uric acid
0%
Urea
0%
Allantoin
0%
Ammonia
Explanation
Adenine and Guanine are purines which are used in production of nucleic acid like RNA and DNA.
Nucleotide which is made up of A pentose sugar, a phosphate group and a nitrogen base.
First the phosphate group present is hydrolysed using the enzyme nucleotidase. Which leaves a nucleoside ie penstose sugar, nitrogen base.
The nitrogen base is then deaminated and hydrolysed to form xanthine by using the enzyme deaminase for example adenine deaminase which works on adenine, Guanine deaminase for guanine.
this Xanthine is then oxidized by the oxidase enzyme and uric acid is formed which is the last step in degradation or catabolism of nucleic acid.
Therefore the answer option A is correct.
A brush border is formed in?
Report Question
0%
Distal convoluted tubule
0%
Bowman's capsule
0%
Proximal convoluted tubule
0%
Loop of Henle
Explanation
The distal convoluted tubule is made up of typical absorptive epithelial cells. It passes close to the afferent and efferent arterioles of the same nephron, the brush border structure gradually increases the surface area.
In the kidneys, filtration of waste from blood takes place in the
Report Question
0%
Urinary bladder
0%
Nephron
0%
Glomerulus
0%
Ureter
Explanation
Filtration mainly occurs in the glomeruli (tuft of capillaries).
The blood pressure forces the blood plasma to diffuse through the capillary walls in the glomerulus.
The blood plasma contains water, glucose, amino acids, and urea (nitrogenous waste).
The blood cells and proteins being large in size do not pass through the capillary wall.
So, the correct answer is 'Glomerulus'.
Bowman's glands are found in _______________.
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0%
olfactory epithelium
0%
external auditory canal
0%
cortical nephrons only
0%
juxtamedullary nephrons only
Explanation
Bowman's gland is a type of tubular mucous glands that occur in the olfactory epithelium. Their ducts open on the olfactory epithelial surface. These gland secret watery mucus to protect and keep the epithelium moist.
So, the correct option is A
The plasma passing through the glomerulus loses about how much percentage of its volume as a filterate?
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0%
$$50 \%$$
0%
$$20 \%$$
0%
$$80 \%$$
0%
$$40 \%$$
Explanation
The Glomerulus is the capillary network of nephrons that help in the filtration of the blood. The quantity of filtrate which is formed by the glomerulus is the glomerulus filtration rate which is measured per minute. It is about 180 mL in a normal healthy person. The filtrate loss is found to be about 15 to 20 %, it is dependent upon the ratio of renal plasma flow and the glomerulus filtration rate.
So, the correct option is '20 %'.
A transitional epithelium is found in or where would you look for pseudostratified columnar epithelium
Report Question
0%
Kidney
0%
Ureter
0%
Trachea
0%
Blood vessel
Part not belonging to nephron tubule is:
Report Question
0%
Glomerules
0%
Bowman's capsule
0%
Collecting duct
0%
Loop of Henle
Explanation
Nephrons are the unit of the excretory system and are used in the process of filtration and excretion. It is divided into:
The renal or malphigian corpuscle - It consists of Bowman's capsule and glomerulus by which blood enters and proceeds for filtration.
The renal tubule - They consist of Proximal and distal convoluted tubule (PCT and DCT) and loop of Henle.
Collecting ducts are sometimes not included in the parts of nephron due to its different origin than other parts of the nephron.
So, the correct option is 'Glomerulus, Bowman's capsule, and Collecting duct'.
Consider the following parts of nephron in excretory system:-
(i) PCT
(ii) Descending limb of Henle's loop
(iii) DCT
(iv) Ascending limb of Henle's loop
(v) Collecting duct
Absorption is minimum in
Report Question
0%
only (ii)
0%
only (v)
0%
Both (i) and (ii)
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only (iv)
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Practice Class 11 Medical Biology Quiz Questions and Answers
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