Match I with II and select the correct option from the codes given below. Column I Column II ( a ) PCT ( i ) Minimum reabsorption ( b ) DCT ( i i ) Filtration of blood ( c ) Loop of Henle ( i i i ) Reabsorption of 70 - 80 % electrolytes ( d ) Counter current mechanism ( i v ) Ionic balance ( e ) Renal corpuscle ( v ) Maintenance of concentration gradient in medulla

a - ( i i i ) , b - ( i v ) , c - ( i ) , d - ( v ) , e - ( i i )

a - ( i i i ) , b - ( v ) , c - m , d - ( i i ) , e - ( i )

a - ( i ) , b - ( i i i ) , c - ( i i ) , d - ( v ) , e - ( i v )

a - ( i i i ) , b - ( i ) , c - ( i v ) , d - ( v ) , e - ( i i )

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Which of the following options has the correct pair of nephron parts that maintain pH and ionic balance of blood?

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Important Questions on Excretory Products and Their Elimination

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 19 - Excretory Products and Their Elimination>MCQS CORNER>Q 61

Which of the following statements is/are incorrect regarding the collecting duct?
(i) It extends from the cortex to the medulla.
(ii) Large amount of water can be reabsorbed by it to produce concentrated urine.
(iii) Small amount of urea diffuses into it from the medulla to keep up the osmolarity.
(iv) It plays a role in maintaining pH and ionic balance of blood by the selective secretion of

H^{+}

and

K^{+}

ions.

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 19 - Excretory Products and Their Elimination>MCQS CORNER>Q 62

Match I with II and select the correct option from the codes given below.

	Column I		Column II
$(a)$	PCT	$(i)$	Minimum reabsorption
$(b)$	DCT	$(i i)$	Filtration of blood
$(c)$	Loop of Henle	$(i i i)$	Reabsorption of $70 - 80 %$ electrolytes
$(d)$	Counter current mechanism	$(i v)$	Ionic balance
$(e)$	Renal corpuscle	$(v)$	Maintenance of concentration gradient in medulla

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 19 - Excretory Products and Their Elimination>MCQS CORNER>Q 63

Select the incorrect statement regarding mechanism of urine formation in man.

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 19 - Excretory Products and Their Elimination>MCQS CORNER>Q 64

Which of the following statements is incorrect?

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 19 - Excretory Products and Their Elimination>MCQS CORNER>Q 65

Read the given statements and select the correct option.
Statement 1: The final reabsorption of water from the urine into the blood occurs through the collecting duct of a mammalian nephron resulting in the production of hyperosmotic urine.
Statement 2: The loop of Henle creates a sodium gradient in the interstitial fluid.

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 19 - Excretory Products and Their Elimination>MCQS CORNER>Q 66

Read the given statements and select the correct option.
Statement 1: Small amount of urea enters the thick segment of Henle’s loop which is transported back to interstitium by collecting tubules.
Statement 2: Collecting tubules and thick segment of Henle’s loop are permeable to urea,

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 19 - Excretory Products and Their Elimination>MCQS CORNER>Q 67

The ability of producing concentrated (hypertonic) urine in vertebrates generally depends on

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 19 - Excretory Products and Their Elimination>MCQS CORNER>Q 68

Refer to the given figure and select the correct option representing the osmolarity at P, Q, R and S.

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Which of the following options has the correct pair of nephron parts that maintain pH and ionic balance of blood?

Important Questions on Excretory Products and Their Elimination

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