EASY
Earn 100

Human urine is usually acidic because

25% studentsanswered this correctly

Important Questions on Excretory Products and Their Elimination

HARD
Explain the mechanism of the concentration of filtrate by Henle’s loop.
EASY

The diagram given below is that of a structure present in a human kidney. Study the same and answer the questions that follow:

Question Image

What is the fluid that comes to part ‘2’ called? Name the main nitrogenous waste in it.

MEDIUM

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

Question Image

MEDIUM
Describe the Excretory system of man giving the structure of a Nephron.
EASY
To maintain a concentration gradient in the medullary interstitium, NaCl______
HARD
Explain the mechanism of glomerular filtration in urine formation
EASY
Why formation of urine and its elimination is necessary in humans?
MEDIUM
The volume of glomerular filtrate produced in one minute is: 
HARD

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
EASY
Identify the part of the nephron that is impermeable to water
HARD
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
MEDIUM
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
MEDIUM
Discuss the statement: Countercurrent mechanism in Vasa recta helps in maintaining concentration gradient in the renal medulla.
EASY

The diagram given below is that of a structure present in a human kidney. Study the same and answer the questions that follow:

Question Image

What is the liquid entering part ‘1’ called? Name two substances present in this liquid that are reabsorbed in the tubule.

EASY
Which of the following factors is responsible for the formation of concentrated urine?