1. pla. give one similarity b/w lungs and kidneys. 2. pls. mention 2 factors that determine the extent of water reabsorption in the kidney tubules. 3. Pls. compare the alveoli in the lungs and the nephrons in the kidney with respect to their structure and function.

Asked by A M | 18th Aug, 2010, 07:44: PM

Expert Answer:

Lungs and Kidney both helps in removing the waste generated in our body.

 
The factors that determine the amount of water reabsorption depends on how much excess water there  is in the body and on how much of dissolved waste is to be excreted.
 

Alveoli

Nephron

Structure

Structure

 

Alveoli are small sac-like structures present inside the lungs.

Nephrons are tubular structures present inside the kidneys.

 

The walls of the alveoli are one cell thick and it contains an extensive network of blood capillaries.

Nephrons are made of glomerulus, bowman’s capsule, and a long renal tube. It also contains a cluster of thin-walled capillaries.

Function

Function

Gas exchange of oxygen and carbon dioxide takes place in the alveoli.

Nephrons principal function is to control the absorption of water and soluble substances such as sodium salts by filtering the blood, reabsorbing what is required and excreting the rest as urine.

 

Answered by  | 19th Aug, 2010, 10:21: AM

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