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Test: Human Excretory System (NCERT)


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Test: Human Excretory System (NCERT) - Question 1

Which one of the following does not constitute a part of singleuriniferous tubule?

Detailed Solution for Test: Human Excretory System (NCERT) - Question 1

Collecting ducts are the larger tubes, each receiving the collecting tubules of several nephrons. Collecting duct does not form a part of the uriniferous tubule.

Test: Human Excretory System (NCERT) - Question 2

Which one of the following is not a part of renal pyramid?

Detailed Solution for Test: Human Excretory System (NCERT) - Question 2

Renal pyramids are the conical areas of medulla. Peritubular capillaries, collecting ducts and loop of Henle lie in the renal pyramids while convoluted tubules lie in the contex of the kidney.

Test: Human Excretory System (NCERT) - Question 3

Which of the following statements is correct?

Detailed Solution for Test: Human Excretory System (NCERT) - Question 3

The thick segment of the ascending limb of Henle's loop extends as DCT. Cortical nephrons do not have vasa recta. PCT and DCT are situated in cortex of the kidney. Bowman's capsule encloses the glomerulus.

Test: Human Excretory System (NCERT) - Question 4

Select the option that correctly identifies the parts lateral from A to F in the given figure of nephron.

Test: Human Excretory System (NCERT) - Question 5

Read the given statements and select the correct option.
Statement 1: The urinary bladder dilates a good deal as arine trickles into it from the ureters.
Statement 2: Urinary bladder is lined throughout by transitional epithelium.

Detailed Solution for Test: Human Excretory System (NCERT) - Question 5

Transitional epithelium permits distension. The transitional epithelium of urinary bladder can be stretched considerably, thus, it dilates a good deal as urine enters into it.

Test: Human Excretory System (NCERT) - Question 6

Match Column-I with Column-II and select the correct option from the codes given below.
Column-I
(A) Delivers blood to glomerulus
(B) Carries urine to pelvis
(C) Collects filtrate form Bowman's capsule
(D) Loop of Henle
Column-II
(i) Ascending and descending limbs
(ii) Renal artery
(iii) Collecting duct
(iv) PCT

Test: Human Excretory System (NCERT) - Question 7

The dotted appearance of cortex of kidney is do

Detailed Solution for Test: Human Excretory System (NCERT) - Question 7

The dotted appearance of cortex of kidney is due to the presence of convoluted parts of the tubule (proximal and distal convoluted tubules).

Test: Human Excretory System (NCERT) - Question 8

A notch present on the inner medial side of kidney is known as

Detailed Solution for Test: Human Excretory System (NCERT) - Question 8

The medial concave border of a kidney contains a notch known as hilus through which the renal artery enters and the renal vein and ureter leave the kidney.

Test: Human Excretory System (NCERT) - Question 9

Renin is released by

Detailed Solution for Test: Human Excretory System (NCERT) - Question 9

A fall in glomerular blood flow/glomerular blood pressure/glomerular filtration rate can activate the jwtaglomerular cells to release renin which regulates the kidney function.

Test: Human Excretory System (NCERT) - Question 10

The basic functional unit of human kidney is

Detailed Solution for Test: Human Excretory System (NCERT) - Question 10

A nephron is a unit of structure and function in a kidney. Each kidney contains about a million nephrons A nephron is a long tubule differentiated into Bowman's capsule, PCT, loop of Henle and DCT, each part is having its own partiular function. 

Test: Human Excretory System (NCERT) - Question 11

Consider the following statements each with one or two blanks.
(i) Towards the centre of the inner concave surface of the kidney is a notch called (1) through which ureters, blood vessels nerves enter.
(ii) The medullia of kidney is divided into a few conical masses called (2) projecting into (3).
(iii) Glomerulus is a tuft of capillaries formed by the (4) artery. Blood from the dlomerulus is carried away by an (5) artery.
Which one of the following options correctly fills the blanks in any two of the statements?

Test: Human Excretory System (NCERT) - Question 12

The longest loop of Henle is found in

Detailed Solution for Test: Human Excretory System (NCERT) - Question 12

Kangaroo rat lives in desert, therefore, it needs to conserve water in the body. In kangaroo rat, loop of Henle is significantly longer as it descends further into the medulla and produces a higher concentration gradient in the surrounding tissue so as to produce urine which is 18 times concentrated than that of their blood. This gradient allows more water to diffuse into surrounding tissues to be reabsorbed.

Test: Human Excretory System (NCERT) - Question 13

The number of nephorns in a kidney is equal to 

Detailed Solution for Test: Human Excretory System (NCERT) - Question 13

Each nephron has a blind cup shaped structure called Bowman's, capsule. Bowman's capsule encloses glomerulus and is a site of ultrafiltration. Therefore, the number of nephrons in kidney is equal to the number of Bowman's capsule. Malpighian body (renal corpuscle) is a collective term used for Bowman's capsule and its glomerulus.

Test: Human Excretory System (NCERT) - Question 14

Podocytes are the cells present on

Detailed Solution for Test: Human Excretory System (NCERT) - Question 14

Podocytes are the special type of cells present in the visceral layer of Bowman's capsule. These cells have foot like processes called pedicels. The space between the pedicels are called slit pores through which the glomerular filtrate filters.

Test: Human Excretory System (NCERT) - Question 15

Which of the following is not correct with respect to human kidney?

Detailed Solution for Test: Human Excretory System (NCERT) - Question 15

Blood enters glomerulus through afferent arteriole and leaves through efferent arteriole.

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