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Assertion :- An increase in body fluid v...

Assertion `:-` An increase in body fluid volume activate osmoreceptors , which stimulate the hypothelamus to release ADH.
Reason `:-` ADH facilitates water reabsorptin from later parts of the tubule.

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:
D
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Explore conceptually related problems

Which of the following statements is INCORRECT? I. Human kidneys can produce urine nearly six times more concentrated than the initial filtrate formed. II. An increase in body fluid volume can switch on the osmoreceptors and stimulate ADH. III. Substance like glucose, amino acids, Na^+ , etc., in the filtrate, are reabsorbed actively by the renal tubule whereas the nitrogenous wastes are absorbed by passive transport IV. Each kidney has nearly one million complex tubular structures called nephrons which are the functional units.

Assertion: The functioning of the kidney is efficiently monitored by hormonal feedback mechanism involving the hypothalamus, JGA and the heart. Reason: An excessive loss of huid from the body can activate the osmoreceptors which stimulate the hypothalamus to release ADH from the adenohypophysis. .

Assertion :- Angiotensin II, activates the adrenall cortex to release aldosterone. Reason :- Aldosterone causes reabsorption of Na^(o+) and water from the distal parts of the tubule.

Which of the following sequence is correct? (i) An increase in body fluid volume rarr switch off the osmoreceptors rarr suppresses the ADH Release (ii) ADH rarr Constricting effect on blood vessel rarr B.P. high rarr Glomerular blood flow more rarr GFR more (iii) Angiotensinogen rarr Angiotensin I rarr Angiotensin II rarr Adrenal cortex rarr Aldosterone (iv) Angiotensin rarr ADH rarr GFR more rarr Aldosterone rarr B.P. high

Assertion :- Angiotensin II is a powerful vasconstrictor Reason :- Aldosterone causes reabsorption of Na^(+) and water from distal parts of the tubule.

Assertion: Failure of secretion of hormone vasopressin causes diabetes mellitus in the patient. Reason: Vasopressin increases the volume of urine by increasing the reabsorption of water from the urine.

Assertion : The failure of secretion of hormone vasopressin causes diabetes mellitus in the patient. Reason : Vasopression reduces the volume of urine by increasing the reabsorbtion of water from the urine.

Assertion :- Antidiuretic hormone, increases the water permeability of distal convoluted tubule. Reason :- In the absence of ADH, water re-absorption is considerably increases.

Assertion: Stimulation of renin secretion will increase the volume of the extracellular fluid (ECF). Reason: The increased ECF occurs due to decreased active reabsorption of Na^(+)

Assertion :- PTH is a hypercalcemic hormone which increases blood Ca^(++) levels. Reason:- PTH acts on bones and stimulates reabsorption of bone or demineralisation. PTH also stimulate reabsorption of Ca^(++) by renal tubules.

MOTION-EXCRETORY PRODUCTS AND THEIR ELIMINATION-EXERCISE - 4 AIIMS - Assertion & Reason Questions
  1. Assertion :- Mammals have the ability to produce a concentrated urine....

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  18. Assertion :- Ultrafiltration takes place in presence of effective filt...

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  19. Assertion :- Proximal convoluted tubule is lined by brush-bordered cub...

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  20. Assertion : Diabetes insipidus iS marked by excessive urination and to...

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