Assertion (A): Nephrons are of two types: Cortical and Juxtamedullary, based on their relative position in cortex and medulla.

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Q.
Given below are statements.
One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): Nephrons are of two types: Cortical and Juxtamedullary, based on their relative position in cortex and medulla.

Reason (R): Juxtamedullary nephrons have short loop of Henle whereas cortical nephrons have longer loop of Henle.

In the light of the above statements, choose the correct answer from the options given below. [2023]

1 (A) is true but (R) is false.

2 (A) is false but (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).

Ans.
(1)

In juxtamedullary nephrons, loop of Henle is very long and runs deep into medulla. In cortical nephrons, loop of Henle is short and extends very little into the medulla.

Solution

1 (A) is true but (R) is false.

2 (A) is false but (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).

Ans.
(1)

In juxtamedullary nephrons, loop of Henle is very long and runs deep into medulla. In cortical nephrons, loop of Henle is short and extends very little into the medulla.

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Solution

1 (A) is true but (R) is false.

2 (A) is false but (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).

Ans. (1) In juxtamedullary nephrons, loop of Henle is very long and runs deep into medulla. In cortical nephrons, loop of Henle is short and extends very little into the medulla.

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Ans.
(1)

In juxtamedullary nephrons, loop of Henle is very long and runs deep into medulla. In cortical nephrons, loop of Henle is short and extends very little into the medulla.