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Nephron

The substance...

Question

The substance which is not reabsorbed into the blood capillaries surrounding the tubule of a nephron is mainly :
(a) glucose
(b) amino acid
(c) urea
(d) water

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Solution

(c) urea

as it is the main excretory waste

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Q. The substance which is not reabsorbed into the blood capillaries surrounding the tubule of a nephron is mainly:
(a) glucose
(b) amino acid
(c) urea
(d) water

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 the 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 questions that follow;

(a) Where does ultrafiltration take place?

(b) Which structure contains the lowest concentration of urea?

(c) Which structure contains the highest concentration of urea?

(d) Which structure (normally) contains the lowest concentration of glucose?

(e) Where is most water reabsorbed?

Q. Which among the following are reabsorbed actively?
Glucose, amino acids, water, nitrogenous waste,

N a^{+}

Q. Choose the correct answers from the following given.
Which of the following is mainly reabsorbed from the distal convoluted tubule of a nephron?

Q. 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 questions that follow:
When is most water reabsorbed?

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