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The yellow colour of normal urine due to

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Important Questions on Excretory Products and their Elimination

MEDIUM
Biology>Human Physiology>Excretory Products and their Elimination>Urine Formation
Discuss the statement: Countercurrent mechanism in Vasa recta helps in maintaining concentration gradient in the renal medulla.
HARD
Biology>Human Physiology>Excretory Products and their Elimination>Urine Formation

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
Biology>Human Physiology>Excretory Products and their Elimination>Urine Formation
The volume of glomerular filtrate produced in one minute is: 
HARD
Biology>Human Physiology>Excretory Products and their Elimination>Urine Formation
Explain the mechanism of glomerular filtration in urine formation
MEDIUM
Biology>Human Physiology>Excretory Products and their Elimination>Urine Formation

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

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HARD
Biology>Human Physiology>Excretory Products and their Elimination>Urine Formation
Explain the mechanism of ultrafiltration in urine formation.
EASY
Biology>Human Physiology>Excretory Products and their Elimination>Urine Formation
Why formation of urine and its elimination is necessary in humans?
MEDIUM
Biology>Human Physiology>Excretory Products and their Elimination>Urine Formation
Which of the following does not favor the formation of large quantities of dilute urine?
EASY
Biology>Human Physiology>Excretory Products and their Elimination>Urine Formation
Human urine is usually acidic because ?
EASY
Biology>Human Physiology>Excretory Products and their Elimination>Urine Formation
The Bowman's capsule, a part of the kidney is the site of:
MEDIUM
Biology>Human Physiology>Excretory Products and their Elimination>Urine Formation
Describe the Excretory system of man giving the structure of a Nephron.
EASY
Biology>Human Physiology>Excretory Products and their Elimination>Urine Formation
To maintain a concentration gradient in the medullary interstitium, NaCl______
EASY
Biology>Human Physiology>Excretory Products and their Elimination>Urine Formation
Descending limb of Henle allows the reabsorption of:
EASY
Biology>Human Physiology>Excretory Products and their Elimination>Urine Formation
Which of the following factors is responsible for the formation of concentrated urine?
HARD
Biology>Human Physiology>Excretory Products and their Elimination>Urine Formation
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
EASY
Biology>Human Physiology>Excretory Products and their Elimination>Urine Formation
Which of the following would help in the prevention of diuresis?
EASY
Biology>Human Physiology>Excretory Products and their Elimination>Urine Formation
A decrease in blood pressure/volume will not cause the release of
MEDIUM
Biology>Human Physiology>Excretory Products and their Elimination>Urine Formation
The glomerular filtration rate is NOT affected by
EASY
Biology>Human Physiology>Excretory Products and their Elimination>Urine Formation
Identify the part of the nephron that is impermeable to water
MEDIUM
Biology>Human Physiology>Excretory Products and their Elimination>Urine Formation
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 HCO3- and hydrogen ions in PCT
(iv) Higher blood pressure in glomerular capillaries