Match the following ? List I List II List III (i) High threshold substances (a) Not at all reabsorbed (p) Creatinine (ii) Low threshold substances (b) Efficiently reabsorbed (q) Glucose (iii) Athreshold substances (c) Reabsorbed in very little amounts (r) Urea

( i - b - q ) , ( i - c - r ) , ( ii - a - p )

( i - b - r ) , ( ii - c - p ) , ( iii - a - q )

( i - a - q ) , ( ii - b - r ) , ( ii - c - p )

( i - a - p ) , ( ii - b - q ) , ( ii - c - r )

EASY

Earn 100

The average quantity of urea excreted in urine by man per day is

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Important Questions on Excretion in Animals and Plants

MEDIUM

Science>Biology>Excretion in Animals and Plants>Urine Formation and Composition of Urine

The volume of glomerular filtrate produced in one minute is:

MEDIUM

Science>Biology>Excretion in Animals and Plants>Urine Formation and Composition of Urine

The glomerular filtration rate is NOT affected by

EASY

Science>Biology>Excretion in Animals and Plants>Urine Formation and Composition of Urine

Why formation of urine and its elimination is necessary in humans?

HARD

Science>Biology>Excretion in Animals and Plants>Urine Formation and Composition of Urine

Explain the mechanism of glomerular filtration in urine formation

EASY

Science>Biology>Excretion in Animals and Plants>Urine Formation and Composition of Urine

Identify the part of the nephron that is impermeable to water

HARD

Science>Biology>Excretion in Animals and Plants>Urine Formation and Composition of Urine

Explain the mechanism of ultrafiltration in urine formation.

HARD

Science>Biology>Excretion in Animals and Plants>Urine Formation and Composition of Urine

Match the following ?

	List I		List II		List III
(i)	High threshold substances	(a)	Not at all reabsorbed	(p)	Creatinine
(ii)	Low threshold substances	(b)	Efficiently reabsorbed	(q)	Glucose
(iii)	Athreshold substances	(c)	Reabsorbed in very little amounts	(r)	Urea

MEDIUM

Science>Biology>Excretion in Animals and Plants>Urine Formation and Composition of Urine

Which of the following does not favor the formation of large quantities of dilute urine?

MEDIUM

Science>Biology>Excretion in Animals and Plants>Urine Formation and Composition of Urine

In the given diagram of urine formation, which process occurs in X and Y?

Question Image

EASY

Science>Biology>Excretion in Animals and Plants>Urine Formation and Composition of Urine

Human urine is usually acidic because ?

MEDIUM

Science>Biology>Excretion in Animals and Plants>Urine Formation and Composition of Urine

Describe the Excretory system of man giving the structure of a Nephron.

MEDIUM

Science>Biology>Excretion in Animals and Plants>Urine Formation and Composition of Urine

The increase in osmolarity from outer to inner medullary interstitium is maintained due to :
(i) Close proximity between Henle's loop and vasa recta
(ii) Counter current mechanism
(iii) Selective secretion of

{HCO}_{3}^{-}

and hydrogen ions in

PCT

(iv) Higher blood pressure in glomerular capillaries

EASY

Science>Biology>Excretion in Animals and Plants>Urine Formation and Composition of Urine

Descending limb of Henle allows the reabsorption of:

MEDIUM

Science>Biology>Excretion in Animals and Plants>Urine Formation and Composition of Urine

Discuss the statement: Countercurrent mechanism in Vasa recta helps in maintaining concentration gradient in the renal medulla.

HARD

Science>Biology>Excretion in Animals and Plants>Urine Formation and Composition of Urine

Match the items given in Column I with those in Column II and select the correct option given below:

	Column – I		Column – II (Part
	Function		Part of Excretory System)
a.	Ultrafiltration	i.	Henle’s loop
b.	Concentration of urine	ii.	Ureter
c.	Transport of urine	iii.	Urinary bladder
d.	Storage of urine	iv.	Malpighian corpuscle
		v.	Proximal convoluted tubule