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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान इयत्ता ११

We can produce a concentrated/ dilute urine. This is facilitated by a special mechanism. Identify the mechanism.

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प्रश्न

We can produce a concentrated/ dilute urine. This is facilitated by a special mechanism. Identify the mechanism.

पर्याय

  • Reabsorption from PCT

  • Reabsorption from Collecting Duct

  • Reabsorption/Secretion in DCT

  • Counter current mechanism in Henle’s loop/Vasa recta

MCQ
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उत्तर

Counter current mechanism in Henle’s loop/Vasa recta

Explanation:

Counter current mechanism operates between the two limbs of the loop of Henle and those of vasa recta. The filtrate becomes concentrated when it moves down the descending limb but is diluted by the ascending limb.

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पाठ 19: Excretory Products and Their Elimination - Exercises [पृष्ठ १११]

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एनसीईआरटी एक्झांप्लर Biology Exemplar [English] Class 11
पाठ 19 Excretory Products and Their Elimination
Exercises | Q 14. | पृष्ठ १११

संबंधित प्रश्‍न

A healthy adult human excretes (on an average) _______ gm of urea/day.


Answer the following in detail.

Draw a labelled diagram of the urinary system in human beings and describe each part. 


Match the terms in Column I with those in Column II and write down the matching pairs 

  Column I  Column II
a Bowman's Capsule  Renal artery
b Contains more CO2 and less urea  Regulates amount of water excreted 
c Anti-diuretic hormone  Renal Vein
d Contains more urea  Glomerulus 

Draw and label the diagram.

Human excretory system


Given below is the figure of certain organs and associated parts in the human body. Study the same and answer the question that follow:

Name the two major steps involved in the formation of the fluid that passes down the part labeled '3'.


The given diagram represents a nephron and its blood supply. Study the diagram and answer the following question :

Label parts 1, 2, 3 and 4.


The given diagram represents a nephron and its blood supply. Study the diagram and answer the following question :   

State the reason for the high hydrostatic pressure in the glomerulus.


 How is urea produced?


Complete the following sentence with appropriate word:

The process of releasing urine is ______.


Complete the following sentence with appropriate word:

The duct which transports urine from kidney to urinary bladder is ______.


Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:

Urine leaves the urinary bladder of a female by means of the uterus.


Differentiate protonephridia from metanephridia.


The capillaries of the glomerulus reunite to form _______ which leaves the Bowman's capsule.


Match the parts given in Column I with their physiological processes given in Column II.

  Column I   Column II
i. Proximal convoluted tubule a. Formation of concentrated urine
ii. Distal convoluted tubule b. Filtration of blood
iii. Henle's loop c. Reabsorption of 70-80% of electrolytes
iv. Vasa recta d. Ionic balance
v. Malpighian body e. Counter mechanism

Flame cells are present in ______.


Select the INCORRECT match.


Match the terms given in Column I with their physiological processes given in Column II and choose the correct answer

Column I Column II
A. Proximal convoluted tubule i. Formation of concentrated urine
B. Distal convoluted tubule ii. Filtration of blood
C. Henle's loop iii. Reabsorption of 70 - 80% of electrolytes
D. Counter-current mechanism iv. Ionic balance
E. Renal corpuscle v. Maintenance of concentration gradient in medulla

Which among the following is incorrectly matched?


Statement I: In the nephron, the descending limb of loop of Henle is impermeable to water and permeable to electrolytes.

Statement II: The proximal convoluted tubule is lined by simple columnar brush border epithelium and increases the surface area for reabsorption.

In the light of the above statements, choose the correct answer from the options given below:


Detrusor muscles are present in the wall of ______.


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