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प्रश्न
Given below is a simplified diagram of the human kidney cut open longitudinally. Answer the questions that follow.
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- Define excretion.
- Why does the cortex of the kidney show a dotted appearance?
- Why does the medulla of the kidney show a striped appearance?
- Write two differences in the composition of the blood flowing through the blood vessels 'A' and 'B'.
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उत्तर
- The process of removal of chemical wastes (mainly nitrogenous wastes) from the body is known as 'excretion'.
- Due to both Bowman's capsule and the proximal convoluted part lying in it.
- Henle's loops and collecting ducts in the medulla of the kidneys create a striped or striated look.
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- Renal Artery: The blood vessel 'B', i.e., the renal artery, contains dirty blood.
Renal Vein: The blood vessel 'A', i.e., the renal vein, contains cleaned blood. - Renal Artery: It pours the blood into the glomerulus and Bowman's capsule.
Renal Vein: It pours blood into the postvena cava. Blood arteries A and B open into the medulla, not the pelvis or ureter.
- Renal Artery: The blood vessel 'B', i.e., the renal artery, contains dirty blood.
संबंधित प्रश्न
the biological/technical terms for the hormone increasing reabsorption of water by kidney tubules
Name the two waste products of the human body which are produced in the body cells.
If you donate one kidney to a needy patient, would it cause any harm to you? Give reason.
Differentiate between the following pairs of terms:
Bowman’s capsule and malpighian capsule.
The diagram below represents a mammalian kidney tubule (nephron) and its blood supply. Parts indicated by the guidelines 1 to 8 are as follows:
1. U-shaped loop of Henle
2. Proximal convoluted tubule with blood capillaries
3. Bowman’s capsule
4. Afferent arteriole from the renal artery
5. Glomerulus
6. Venule to the renal vein
7. Collecting tubule
8. Distal convoluted tubule with blood capillaries Study the diagram and answer the following questions in each case:
(i) Where does ultrafiltration take place?
(ii) Which structure contains the lowest concentration of urea?
(iii) Which structure contains the highest concentration of urea?
(iv) Which structure contains the lowest concentration of glucose?
(v) Where is the most water reabsorbed?
Complete the following sentence with appropriate word:
Human kidney is made up of ______.
Write the functional activity of the following structure: Vasopressin
Complete the diagram/chart with correct labels/ information. Write the conceptual details regarding it.
Name the organs that store and release the urine.
Give two examples of the following:
Main excretory organs
