Class 11 Biology Important Chapter 16 Excretory Products and their Elimination

Class 11 Biology Important Chapter 16 Excretory Products and their Elimination Solutions English Medium As Per AHSEC New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters ASSEB Class 11 Biology Important Solutions and select need one. AHSEC Class 11 Biology Additional Notes English Medium Download PDF. HS 1st Year Biology Important Solutions in English.

Class 11 Biology Important Chapter 16 Excretory Products and their Elimination

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Excretory Products and their Elimination

Chapter: 16

IMPORTANT QUESTION AND ANSWER

Very Short and Short Answer Type Question: 

1. Give two examples of ammonotelic animals.

Ans. Bony fishes, Aquatic arthropods.

2. What is vasa recta?

Ans. Peritubular capillary networks around PCT and DCT give rise to capillaries parallel to Loop of Henle and collecting ducts in medulla called vasa recta.

3. Define glomerular filtration.

Ans. Ultrafiltration of blood (filtration under pressure) through the semi permeable glomerular capillaries and podocytes in bowman capsule.

4. Mention two metabolic disorders that can be diagnosed with urine analysis.

Ans. ketonuria and glycosuria.

5. What is responsible for Glomerular filtration?

Ans. High blood pressure in glomerular capillaries.

6. What is the advantage of excretion of uric acid?

Ans. Uric acid is the least toxic and can be removed with minimum loss of water.

7. In which part of nephron filtration takes place?

Ans. Glomerulus.

8. Name the three kinds of nitrogen excretion.

Ans. (i) Ammonotelism, (ii) Ureotelism and (iii) Uricotelism.

9. Name the different parts of a nephron.

Ans (i) Bowman’s capsule, (ii) Proximal convoluted tubule, (iii) Loop of Henle, (iv) Distal convoluted tubule.

10. What are the ducts of Bellini ?

Ans. These are the collecting ducts which unite together in the medulla to form the longer duct, the duct of Bellini.

11. Name the hormone which controls the concentration of sodium in the body.

Ans: Aldosterone is a hormone which controls the concentration of sodium in the body.

12. What are uricotelic and ureotelic animals ?

Ans: Uricotelic animals: Animals which excrete uric acid as main nitrogenous waste product e.g., birds.

Ureotelic animals : Animals which excrete urea as that chief nitrogenous waste product e.g., man.

13. What is the functional unit of the kidney?

Ans: The functional unit of the kidney is the nephron. Each nephron consists of the glomerulus (a tuft of capillaries) and a renal tubule, which includes Bowman’s capsule, the proximal convoluted tubule, Henle’s loop, the distal convoluted tubule, and the collecting duct.

14. What is the function of Henle’s loop in the nephron?

Ans: Henle’s loop is responsible for creating a concentration gradient in the kidney medulla, which helps in water reabsorption and concentrating urine. The descending limb allows water reabsorption, while the ascending limb actively transports electrolytes.

15. What is the function of the collecting duct in the kidney?

Ans: The collecting duct is responsible for the final concentration of urine. It reabsorbs water under the influence of Antidiuretic Hormone (ADH) and secretes certain ions, helping in the regulation of body fluid balance and maintaining osmolarity in the kidney.