Advertisements
Advertisements
प्रश्न
Study the diagram given below and then answer the questions that follow:
 |
- Name the region in the kidney where the above structure is present?
- Name the parts labelled 1, 2, 3 and 4.
- Name the stages involved in the formation of urine.
- What is the technical term given to the process occurring in 2 and 3? Briefly describe the process.
Advertisements
उत्तर
- Renal cortex
-
- Afferent arteriole
- Glomerulus
- Bowman's capsule
- Efferent arteriole
- Ultrafiltration, tubular reabsorption, and tubular secretion.
- The process occurring in 2 and 3 is known as ultrafiltration.
Ultrafiltration: The blood flows through the glomerulus under great pressure, much greater than in the capillaries elsewhere. The reason for this greater pressure is that the efferent (outgoing) arteriole is narrower than the afferent (incoming) arteriole. This high pressure (hydrostatic pressure) causes the liquid part of the blood to filter out from the glomerulus into the renal tubule. This filtration under extraordinary force is called ultrafiltration.
संबंधित प्रश्न
How is the amount of urine produced regulated?
Name the procedure used in the working of artificial kidney.
The excretory unit in the human excretory system is called ______.
The following diagram represents a mammalian kidney tubule (nephron) and its blood supply.
Parts indicated by the guidelines 1 to 8 are as follows:
1. Afferent arteriole from renal artery
2. efferent arteriole
3. Bowman’s capsule
4. Glomerulus;
5. Proximal convoluted tubule with blood capillaries;
6. Distal convoluted tubule with blood capillaries;
7. collecting tubule;
8. U-shaped loop of Henle
Study the diagram and answer the question that follow:
Where does ultrafiltration take place?
Given below is a highly simplified diagram of the human kidney cut open longitudinally. Answer the question that follow:
Why does the cortex of the kidney show a dotted appearance?
Answer the following question:
Explain the human excretory system with the help of a suitable diagram.
Name the Following
The blood vessels which brings pure blood to the kidneys:
Choose the correct option.
The minor calyx _______.
“All plants give out oxygen during the day and carbon dioxide during the night”. Do you agree with this statement? Give a reason.
Certain organisms that are aquatic in habitat, tolerate only a narrow range of salinity. What term is given to such animals?
