11th Zoology - Book Back Answers - Unit 8 - English Medium Guides

 

 

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Tamil Nadu Board 11th Standard Zoology - Unit 8: Book Back Answers and Solutions

    This post covers the book back answers and solutions for Unit 8 – Zoology from the Tamil Nadu State Board 11th Standard Zoology textbook. These detailed answers have been carefully prepared by our expert teachers at KalviTips.com.

    We have explained each answer in a simple, easy-to-understand format, highlighting important points step by step under the relevant subtopics. Students are advised to read and memorize these subtopics thoroughly. Once you understand the main concepts, you’ll be able to connect other related points with real-life examples and confidently present them in your tests and exams.

    By going through this material, you’ll gain a strong understanding of Zoology  Unit 8 along with the corresponding book back questions and answers (PDF format).

Question Types Covered:

• 1 Mark Questions: Choose the correct answer, Fill in the blanks, Identify the correct statement, Match the following 
• 2 Mark Questions: Answer briefly 
• 3, 4, and 5 Mark Questions: Answer in detail

All answers are presented in a clear and student-friendly manner, focusing on key points to help you score full marks.

All the best, Class 11 students! Prepare well and aim for top scores. Thank you!

Unit 8: Excretion

I. Multiple Choice Questions

1. Concentration of urine depends upon which part of the nephron
a. Bowman's capsule
b. Length of Henle's loop
c. P.C.T.
d. Network of capillaries arising from glomerulus
Answer Key:
b. Length of Henle's loop

2. If Henle's loop were absent from mammalian nephron, which one of the following is to be expected?
a. There will be no urine formation
b. There will be hardly any change in the quality and quantity of urine formed
c. The urine will be more concentrated
d. The urine will be more dilute
Answer Key:
d. The urine will be more dilute

3. What will happen if the stretch receptors of the urinary bladder wall are totally removed?
a. Micturition will continue
b. Urine will be continue to collect normally in the bladder
c. There will be micturition
d. Urine will not collection the bladder
Answer Key:
a. Micturition will continue

4. The end product of Ornithine cycle is
a. carbon dioxide
b. uric acid
c. urea
d. ammonia
Answer Key:
c. urea

5. Identify the wrong match
a. Bowman's capsule -Glomerular filteration
b. DCT - Absorption of glucose
c. Henle's loop -Concentration of urine
d. PCT - Absorption of Na+ and K+ ions
Answer Key:
d. PCT - Absorption of Na+ and K+ ions

6. Podocytes are the cells present on the
a. Outer wall of Bowman's capsule
b. Inner wall of Bowman's capsule
c. Neck of nephron
d. Wall glomerular capillaries
Answer Key:
b. Inner wall of Bowman's capsule

7. Glomerular filtrate contains
a. Blood without blood cells and proteins
b. Plasma without sugar
c. Blood with proteins but without cells
d. Blood without urea
Answer Key:
c. Blood with proteins but without cells

8. Kidney stones are produced due to deposition of uric acid and 

a. silicates
b. minerals
c. calcium carbonate
d. calcium oxalate
Answer Key:
d. calcium oxalate

9. Animal requiring minimum amount of water to produce urine are
a. ureotelic
b. ammonotelic
c. uricotelic
d. chemotelic.
Answer Key:
c. uricotelic

10. Aldosterone acts at the distal convoluted tubule and collecting duct resulting in the absorption of water through
a. Aquaphorinsb
b. spectrins
c. GLUT
d. Chloride channels.
Answer Key:
a. Aquaphorinsb

11. The hormone which helps in the reabsorption of water in kidney tubules is
a. cholecystokinin
b. angiotensin II
c. antidiuretic hormone
d. pancreozymin
Answer Key:
c. antidiuretic hormone

12. Malpighian tubules remove excretory products from
a. mouth
b. oesophagus
c. haemolymph
d. alimentary canal
Answer Key:
c. haemolymph

 

II. Short answer questions

a

III. Long answer questions

a

IV. Exercise

a