Advertisements
Advertisements
प्रश्न
Given below is a simplified diagram of the human kidney cut open longitudinally. Answer the questions that follow.
 |
- 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'.
Advertisements
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.
-
- 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.
APPEARS IN
संबंधित प्रश्न
Fill in the following blank with suitable word:
The organs which extract the nitrogenous wastes from the blood are ..........
What is the name of the tubes which connect the kidneys to bladder?
Fill in the blank :
Nitrogenous wastes in the urine are in the form of urea and .....................
If you donate one kidney to a needy patient, would it cause any harm to you? Give reason.
Explain in your own words with suitable examples.
How does excretion occur in human beings?
Given below is a diagram of a human kidney, cut open longitudinally. Answer the following:
(i) Give definition of excretion.
(ii) Name the unit of kidney.
(iii) Why does the cortex of kidney show dotted appearance?
(iv) List the functions of the kidney.
Look at the figure given below. It is a section of human kidney as seen from the front.
Which area/part (give its name and number given on the diagram) which contains the following:
(i) Malpighian capsule
(ii) The pyramids
(iii) Freshly collected urine
The following diagram represents a mammalian kidney tubule (nephron) and its blood supply.
Parts indicated by the guidelines 1to 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:
Which structure contains the highest concentration of urea?
The following diagram represents a mammalian kidney tubule (nephron) and its blood supply.
Parts indicated by the guidelines 1to 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:
Which structure (normally) contains the lowest concentration of glucose?
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?
