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प्रश्न
Study the diagram given below and then answer the questions that follow:
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- 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.
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उत्तर
- Renal cortex
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- 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
Why is it necessary to excrete waste products?
The diagram given below shows a section of human kidney. Study the diagram carefully and answer the questions that follow :
(i) Label the parts numbered 1 to 4.
(ii) Why does part ‘2’ have a striped appearance?
(iii) What is the fluid that passes down part ‘4’? Name the main nitrogenous waste present in it.
(iv) Mention the structural and functional units of kidneys.
(v) Name the two major steps in the formation of the fluid mentioned in Q.5 (a) (iii).
Name a waste gas released by the plants only during the night time.
A dialysis machine contains long tubes coiled in a tank containing dialysing solution Of what substance are the tubes made?
The excretory unit in the human excretory system is called:
State if the following statement is true or false. Correct the statement if it is false.
Liver produces bile pigments from the hemoglobin of broken RBCs.
Answer the following in detail.
Describe the process of urine formation.
Complete the following sentence with appropriate word:
The U-shaped portion of a nephron located in the medulla region is called ______.
The mode of excretion of nitrogenous wastes like ammonia which takes place by simple diffusion is called ______.
Name the organs that store and release the urine.
