Select Chapter Topics:
Q. No.To maintain the pH and ionic balance of the body fluids, the proximal convoluted tubule selectively secretes all the following into the filtrate except:
I.
Hydrogen ion
II.
Potassium ion
III.
Ammonia
IV.
Bicarbonate ion
1. I & II
2. II & III
3. II & IV
4. Only IV
Subtopic: Human Kidney: Location & Cut Section |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Approximately what amount of carbon dioxide is removed by lungs per hour in a healthy resting individual?
| 1. | 200 ml | 2. | 12 L |
| 3. | 122 L | 4. | 288 L |
Subtopic: Role of other Organs in Excretion |
54%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
During the concentration of urine by human kidneys:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | Small amounts of urea is transported back to medullary interstitium by ascending portion of vasa recta |
| II: | NaCl is returned to the medullary interstitium by the descending portion of vasa recta |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Concentration of Urine: I |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Identify the correct statements:
| I: | Each kidney of an adult human measures 10-12 cm in length, 5-7 cm in width and 2-3 cm in thickness. |
| II: | The DCTs of many nephrons open into a straight tube called collecting duct. |
| III: | Each nephron has two parts – the glomerulus and the renal tubule. |
| IV: | The renal tubule begins with the proximal convoluted tubule. |
| 1. | Only I and II | 2. | Only I, II and III |
| 3. | Only II and III | 4. | I, II, III and IV |
Subtopic: Human Kidney: Functions | Human Kidney: Location & Cut Section |
From NCERT
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Potassium ions:
| I: | are filtered at the glomerulus |
| II: | are reabsorbed at the PCT |
| III: | are secreted at DCT |
| 1. | I & II only | 2. | I & III only |
| 3. | II & III only | 4. | I, II & III |
Subtopic: Formation of Urine |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Consider the two statements:
| Assertion (A): | An excess of aldosterone can cause a decrease in potassium ion concentration in body fluids. |
| Reason (R): | Aldosterone acts mainly at the renal tubules and stimulates the reabsorption of Na+ and water. |
| 1. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are False. |
| 4. | Both (A) and (R) are True and (R) correctly explains (A). |
Subtopic: Autoregulation of GFR |
55%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)
In light of the above statements, choose the correct answer from the options given below:
| Assertion (A): | Ascending limb of the loop of Henle is impermeable to water and allows transport of electrolytes actively or passively. |
| Reason (R): | Dilution of filtrate takes place due to efflux of electrolytes in the medullary fluid |
In light of the above statements, choose the correct answer from the options given below:
| 1. | (A) is True, (R) is False |
| 2. | (A) is False, (R) is True |
| 3. | Both (A) and (R) are True and (R) is the correct explanation of (A) |
| 4. | Both (A) and (R) are True but (R) is not the correct explanation of (A) |
Subtopic: Function of the tubules |
From NCERT
NEET - 2023
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Given below are two statements:
| Assertion (A): | Vasa recta and Henle's loop play a significant role in maintaining high osmolarity of medullary interstitial fluid |
| Reason (R): | Osmolarity increases from 300 mOsmolL-1 to 1200 mOsmolL-1 as we move from cortex to medullary region |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Concentration of Urine |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Given below are two statements:
| Assertion (A): | Na+ reabsorption from glomerular filtrate occurs in PCT, ascending limb of loop of Henle and collecting duct |
| Reason (R): | Na+ is always reabsorbed by passive process in PCT, ascending limb of loop of Henle and collecting duct |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Formation of Urine: Ultrafiltration |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Vasa recta:
1. Only I is correct
2. Only II and III are correct
3. Only III is correct
4. I, II and III are correct
| I: | is a fine capillary network around the renal tubule formed by efferent arteriole. |
| II: | runs parallel to the Henle’s loop in juxtamedullary nephrons. |
| III: | is absent or highly reduced in cortical nephrons. |
2. Only II and III are correct
3. Only III is correct
4. I, II and III are correct
Subtopic: Human Kidney: Functions |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Select Chapter Topics:
© 2025 GoodEd Technologies Pvt. Ltd.