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A nephron is devoid of loop of Henle in...

A nephron is devoid of loop of Henle in

A

Man

B

Rabbit

C

Frog

D

Dog

Text Solution

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The correct Answer is:
To solve the question "A nephron is devoid of loop of Henle in," we will analyze each of the provided options and determine which organism's nephron lacks the loop of Henle. ### Step-by-Step Solution: 1. **Understand the Structure of Nephrons**: - Nephrons are the functional units of the kidney and consist of several parts: the proximal convoluted tubule (PCT), loop of Henle, distal convoluted tubule (DCT), and collecting ducts. 2. **Identify the Function of the Loop of Henle**: - The loop of Henle is a U-shaped structure that plays a crucial role in the recovery of water and sodium chloride from urine, allowing for the production of concentrated urine. This is particularly important for animals that need to conserve water. 3. **Evaluate Each Option**: - **Option 1: Man**: Humans have a loop of Henle in their nephrons, which aids in water reabsorption. Therefore, this option is incorrect. - **Option 2: Rabbit**: Rabbits also possess a loop of Henle in their nephrons, which helps in water conservation. This option is incorrect. - **Option 3: Frog**: Frogs have short nephrons that lack a loop of Henle. This is because they live in environments with abundant water, so they do not need to conserve water. This option is correct. - **Option 4: Dog**: Dogs have a loop of Henle in their nephrons, similar to humans and rabbits, to aid in water reabsorption. This option is incorrect. 4. **Conclusion**: - The only organism among the options provided that has nephrons devoid of a loop of Henle is the frog. Therefore, the correct answer is **Option 3: Frog**.
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