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Assertion: The functioning of the kidney...

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. .

A

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

B

if both assertion and reason are true but reason is not a correct explantion of the 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:
C
The functioning of the kidney is efficiently monitored by hormonal feedback mechanism involving the hypothalamus, JGA and the heart.
An excessive loss of fluid from the body can activate the osmoreceptors which stimulate the hypothalamus to release ADH from the neurohypophysis.
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The functioning of the kidneys is efficiently monitored and regulated by hormonal feedback mechanisms involving -

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.

Assertion :- Feedback mechanism for regulartion of kidney involve hypothalamus & JGA. Reason :- ANF mechanism check renin-angiotensin mechanism.

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 (A): If the quantity of hormones secreted gets deviated from its normal range, our body gets affected severely. Reason (R): The function of hormone is to stimulate or inhibit the targeted organ to act so that homeostasis of our body can be maintained.

Complete the following paragraph by selecting the option that correctly fils the blanks (i)- (iv) The kidney have built-in mechanisms for the regulation of glomerular filtration rate. One such efficient mechanism is carried out by (i)._____ It is a special sensitive region formed by cellular modifications in the (ii)._________ and the (iii)._________ at the location of their contact. A fall in GFR can activate the JG cells to release (iv).________ which can stimulate the glomerular blood flow the thereby brings GFR back to normal

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