11th Standard Syllabus & Materials

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TN 11th Tamil இயற்கை வேளாண்மை,சுற்றுச்சூழல் -செய்யுள் - மனோன்மணீயம் Important Questions And Answers Study Material - QB365 Set A

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11th Standard

TN 11th Tamil மொழி கலை -செய்யுள் - ஒவ்வொரு புல்லையும் Important Questions And Answers Study Material - QB365 Set A

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TN 11th Tamil பீடு பெற நில் - இலக்கணம் - பகுபத உறுப்புகள் Important Questions And Answers Study Material - QB365 Set A

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11th Standard

TN 11th Tamil பீடு பெற நில் - செய்யுள் - குறுந்தொகை Important Questions And Answers Study Material - QB365 Set A

11th Standard English Medium Biology (Zoology) Subject Excretion Book Back 3 Mark Questions with Solution Part - II

Published on: 08/06/2021

QB365 provides detailed and simple solution for every book back questions in class 11 Biology subject.It will helps to get more idea about question pattern in every book back questions with solution.

Download Tamil Nadu 11th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.

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Std: 11th Standard - Biology

chapter: - Book back Questions

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Questions:

Generic 2

4 x 2 = 8

How is urea formed in the human body?

Differentiate protonephridia from metanephridia

What solute is normally present in the body to estimate GFR in humans?

Which segment is the site of secretion and regulated reabsorption of ions and pH homeostasis?

Generic 3

1 x 3 = 3

How is the process of micturition altered by toilet training?

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Answers Key:

Generic 2

4 x 2 = 8

The nitrogenous waste formed as a result of breakdown of amino acids is converted to urea in the liver by the Ornithine cycle or urea cycle

S.N	Protonephridia	Metanephridia
1.	Primitive	Advanced
2.	Commonly found in primitive chordates (aquatic).	Commonly found in advanced terrestrial animals.
3.	NH₃ is the excretory product.	NH₃ or urea may be the excretory product.
4.	Originated /derived from invertebrates.	Originated/ derived from primitive chordates.

All the blood plasma components without corpuscles.

Distal convoluted tubule (DCT of nephron).

Generic 3

1 x 3 = 3

1. The process of release of urine from the urinary bladder is called micturition. It is more than a simple reflex. The control of micturition is learnt is infancy. It induces other sensory fibres in the bladder which conveys the information on fullness of bladder.
2. This information reaches the centres in thalamus and cerebral cortex of the brain via the spine.
3. The brain can sense the need to pass urine and urgency of the situation.
4. The brain centres can control the micturition, reflex by inhibiting the parasympathetic motor, fibres.
5. When convenient, the brain centre removes this control and permits micturition under conscious control.
6. Further the link between spine and cerebral cortex is developed only nearing 2 years of age. Hence toilet training is not possible in infants.
7. Therefore by training children at a young age, the micturition reflex can be brought under control.