Advertisements
Advertisements
Question
Why is excretion necessary in living beings?
Advertisements
Solution
The excretion is necessary because the toxic products if allowed to be retained in the body act as poison and cause great harm to the body. If they exceed the threshold, they may even cause death.
APPEARS IN
RELATED QUESTIONS
Name the two waste products of the human body which are produced in the body cells.
Fill in the blank.
Malpighian body consists of Bowman’s capsule and .....................
Answer the following in short.
What is excretion?
Correct and rewrite the statements by changing the biological term that is underlined for the statement:
The kidney is composed of number of neurons.
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:
Where is most water reabsorbed ?
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?
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?
Name the Following
The blood vessels which brings pure blood to the kidneys:
Write the functional activity of the following structure: Nephron
Write the functional activity of the following structure: Vasopressin
