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Assertion :- Conditional reabsorption of...

Assertion `:-` Conditional reabsorption of `Na^(o+)` and water takes place in DCT.
Reason `:-` DCT is also capacble of selective secretion of hydrogen and potassium ions.

A

If both assertion and reason are true and reason is the correct explanation of assertion

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
B
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Which of the following statements are correct? (i). Reabsorption of water occurs passively in the initial segment of nephron. (ii). Nitrogenous wastes are absorbed by passive transport. (iii). Conditional reabsorption of Na^(+) and water takes palce in DCT. (iv). DCT reabsorbs HCO_(3)^(-) (v). DCT is capable of selective secretion of H^(+),K^(+) and NH_(3) to maintain pH and Na^(+)-K^(+) balance in blood. (vi). Substance like glucose, amino acids, Na^(+) , etc,. it the filtrate are reabsorbed actively.

Maximum reabsorption of Na^(+) and water takes place in which segment of Nephron ?

Read the following functions and identify the part of nephron responsible for it. A. Nearly all of the essential nutrient and 70-80% of electroytes and water are reabsorbed by this segement. B. Conditional reabsorption of Na^(+) and water takes place in this segement. C. Large amounts of water could be reabsorbed from this region to produce concentrated urine.

Read the following statements and find out the INCORRECT statement . (a) During urine formation, the tubular cells secrete substance like H^+, Na^+ and HCO_3^- into the filtrate. (b) As glomerular filtrate move down in descending limb of Henle it gets concentrated and as concentrated filtrate pass upward in ascending limb of HL it gets diluted. (c) Conditional reabsorption of Na^+ and water takes place in PCT. (d) Reabsorption in ascending limb of HL is minimum.

The selective secretion of hydrogen ion, ammonia and potassium into the filtrate takes place mainly in

Assertion (A): The mobility of Na^(o+) is lower than that of K^(o+) ion. Reason (R): The ionic mobility depends upon the effective radius of the ion.

Assertion: Absorption of simple sugar, alcohol and medicines takes place in the stomach. Reason: Most of the water is absorbed in the large intestine

Which of theses statements about proximal convoluted tubule is/are true? I. it is lined by simple columnar brush border epithelium which increases the surface area for reabsorption. II Nearly all of the essential nutrients and 70%-80% of electrolytes and water are reabsorbed by this segment. III. It selectively secretes hydrogen ions, ammonia and potassium ions into the filtrate. IV. It is the most convoluted part of the nephron and is present in the medullary region of the kidney.

Read the given statements regarding human excretory system and select the correct ones. (i). Presence of glucose in urine is known as uremia. (ii). Distal convoluted tubule (DCT) selectively secretes hydrogen ions, ammonia and potassium ions into the filtrate. (iii). Macule densa is formed by cellular modification in the distal convoluted tubule and the afferent arteriole at their contact location. (iv). Atrial natriuretic factor (ANF) can cause vasoconstriction when blood flow is low to the atria of the heart.

MOTION-EXCRETORY PRODUCTS AND THEIR ELIMINATION-EXERCISE - 4 AIIMS - Assertion & Reason Questions
  1. Assertion :- In PCT all of the essential nutrient and 70-80 percent of...

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  2. Assertion :- When filtrate pass through descending limb of loop of Hen...

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  3. Assertion :- Conditional reabsorption of Na^(o+) and water takes place...

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  4. Assertion :- Mammals have the ability to produce a concentrated urine....

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  5. Assertion :- An increase in glomerular blood pressure can activate the...

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  6. Assertion :- An increase in body fluid volume activate osmoreceptors ,...

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  7. Assertion :- Angiotensin II, activates the adrenall cortex to release ...

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  8. Assertion :- Nearly 99 percent of the filtrate has to be reabsorbed by...

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  9. Assertion :- The primary function of sweat is to facilitate a cooling ...

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  10. Assertion :- The descending limb of loop of Henle is permeable to wate...

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  11. Assertion :- In cortical nephrone, the loop of Henle is too short and ...

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  12. Assertion :- ADH prevents diuresis. Reason :- ADH also affect the ki...

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  13. Assertion :- The JGA plays a complex regulaltory role. Reason :- An...

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  14. Assertion :- Angiotensin II is a powerful vasconstrictor Reason :- A...

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  15. Assertion :- An increase in blood flow to the atria of heart can caus...

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  16. Assertion :- Feedback mechanism for regulartion of kidney involve hypo...

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  17. Assertion :- Analysis of urine helps in clinical diagnosis of many met...

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  18. Assertion :- Haemodialysis method is used in case of kidney failure. ...

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  19. Assertion :- Human kidneys can produce urine nearly four times concent...

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  20. Assertion :- Peritubular capillaries secrete substances in the convolu...

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