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A fall in glomerular filtration rate (GFR) activates
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Easy
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Solving time: 2 mins

A fall in glomerular filtration rate (GFR) activates

A
adrenal cortex to release aldosterone

B
adrenal medulla to release adrenaline

C
juxta - glomerular cells to release renin

D
posterior pituitary to release vasopressin

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Views: 6,035 students

Updated on: Mar 23, 2023

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Xtract Objective Biology for NEET (Disha)

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The amount of the filtrate formed by the kidneys per minute is called glomerular filtration rate (GFR). GFR in a healthy individual is approximately 125 ml/minute, ., 180 litres per day. A fall in GFR can activate the JG cells to release renin which can stimulate the glomerular blood flow and thereby the GFR back to normal. Renin converts angiotensinogen in blood to angiotensin I and further angiotensin II. Angiotensin II being powerful vasoconstrictor increases the glomerular blood pressure and thereby GFR.
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Practice questions from Xtract Objective Biology for NEET (Disha)

Question 1
Medium
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The given figure shows the longitudinal section of kidney with few structures labelled as I, II, III & IV identify renal vein in the given figure.
  1. I
  2. II
  3. III
  4. IV
Topic

Topic:

Excretory Products and their Elimination

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Book:

Xtract Objective Biology for NEET (Disha)

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Question 2
Easy
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Views: 5,413

If the afferent arteriole that supplies blood to the glomerulus becomes dilated,
  1. the protein concentration of the filtrate decreases.
  2. hydrostatic pressure in the glomerulus decreases.
  3. the glomerular filtration rate increases.
  4. all of the above
Topic

Topic:

Excretory Products and their Elimination

Book

Book:

Xtract Objective Biology for NEET (Disha)

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Question 3
Easy
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Views: 5,996

Which of the following statement is correct?
  1. Vasa recta is not present in cortical nephrons.
  2. Maximum number of nephrons in kidney are juxtamedullary type.
  3. DCT of many nephrons open into collecting tubule.
  4. All of the above
Topic

Topic:

Excretory Products and their Elimination

Book

Book:

Xtract Objective Biology for NEET (Disha)

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Question 4
Easy
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Views: 5,617

Ultrafiltration occurs in a glomerulus when
  1. hydrostatic pressure exceeds osmotic pressure.
  2. osmotic pressure exceeds hydrostatic pressure.
  3. capsular hydrostatic pressure exceeds glomerular hydrostatic pressure.
  4. colloidal osmotic pressure plus capsular pressure remain less than glomerular hydrostatic pressure.
Topic

Topic:

Excretory Products and their Elimination

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Book:

Xtract Objective Biology for NEET (Disha)

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Practice more questions from Excretory Products and their Elimination

Question 1
Easy
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Views: 5,635

The portion of a nephron which is relatively impermeable to water is
  1. collecting tubule
  2. ascending limb of Henle
  3. distal convoluted tubule
  4. descending limb of Henle
Topic

Topic:

Excretory Products and their Elimination

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Question 2
Medium
Views

Views: 5,578

Through the thick segment of ascending limb of Henle’s loop the
  1. NaCl can pass by active transport from filtrate to the interstitial fluid.
  2. NaCl can pass by passive transport into interstitial fluid.
  3. NaCl cannot pass from the filtrate to interstitial fluid.
  4. Water can pass freely from filtrate to interstitial fluid.
Topic

Topic:

Excretory Products and their Elimination

Book

Book:

Xtract Objective Biology for NEET (Disha)

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Question 3
Hard
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Views: 5,283

Which one of the following correctly explains the function of a specific part of a human nephron?
Topic

Topic:

Excretory Products and their Elimination

Book

Book:

Biology-for-NEET-Volume-1-Class-XI

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Question 4
Easy
Views

Views: 6,043

Identify A-D in the following structure and the correct option for A, B, C and D.
  1. A – Afferent arteriole, B – Efferent arteriole, C – Bowman’s capsule, D – Proximal convoluted tubule
  2. A – Efferent arteriole, B – Afferent arteriole, C – Bowman’s capsule, D – DCT
  3. A – Efferent arteriole, B – Efferent arteriole, C – Bowman’s capsule, D – DCT
  4. A – Efferent arteriole, B – Afferent arteriole, C – Bowman’s capsule, D – DCT
Topic

Topic:

Excretory Products and their Elimination

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  3. What are the implications for our understanding of anatomy, physiology, and disease?
  4. How might we explain this to the public? Since the public has limited medical knowledge, consider how you would explain these complex concepts to them in a way they will understand.
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Answer the following questions about growth hormone in sports:
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Question Text
A fall in glomerular filtration rate (GFR) activates
Updated OnMar 23, 2023
TopicExcretory Products and their Elimination
SubjectBiology
ClassClass 11
Answer TypeText solution:1 Video solution: 4
Upvotes500
Avg. Video Duration2 min