Tamil Nadu Board 11th Standard Zoology - Unit 9: Book Back Answers and Solutions
This post covers the book back answers and solutions for Unit 9 – 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 9 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 9: Locomotion and Movement
I. Multiple Choice Questions
a. ectoderm
b. mesoderm
c. endoderm
d. neuro ectoderm
Answer Key:
b. mesoderm
2. Muscles are formed by
a. myocytes
b. leucocytes
c. osteocytes
d. lymphocytes
Answer Key:
a. myocytes
3. The muscles attached to the bones are called
a. skeletal muscle
b. cardiac muscle
c. involuntary muscle
d. smooth muscles
Answer Key:
a. skeletal muscle
4. Skeletal muscles are attached to the bones by
a. tendon
b. ligament
c. pectin
d. fibrin
Answer Key:
a. tendon
5. The bundle of muscle fibres is called
a. Myofibrils
b. fascicle
c. sarcomere
d. sarcoplasm
Answer Key:
b. fascicle
6. The pigment present in the muscle fibre to store oxygen is
a. myoglobin
b. troponin
c. myosin
d. actin
Answer Key:
a. myoglobin
7. The functional unit of a muscle fibre is
a. sarcomere
b. sarcoplasm
c. myosin
d. actin
Answer Key:
a. sarcomere
8. The protein present in the thick filament is
a. myosin
b. actin
c. pectin
d. leucin
Answer Key:
a. myosin
9. The protein present in the thin filament is
a. myosin
b. actin
c. pectin
d. leucin
Answer Key:
b. actin
10. The region between two successive Z-discs is called a
a. sarcomere
b. microtubule
c. myoglobin
d. actin
Answer Key:
a. sarcomere
11. Each skeletal muscle is covered by
a. epimysium
b. perimysium
c. endomysium
d. hypomysium
Answer Key:
a. epimysium
12. Knee joint is an example of
a. saddle joint
b. hinge joint
c. pivot joint
d. gliding joint
Answer Key:
b. hinge joint
13. Name of the joint present between the atlas and axis is
a. synovial joint
b. pivot joint
c. saddle joint
d. hinge joint
Answer Key:
b. pivot joint
14. ATPase enzyme needed for muscle contraction is located in
a. actinin
b. troponin
c. myosin
d. actin
Answer Key:
c. myosin
15. Synovial fluid is found in
a. Ventricles of the brain
b. Spinal cord
c. immovable joint
d. freely movable joints
Answer Key:
d. freely movable joints
16. Inflammation of joints due to accumulation of uric acid crystals is called as
a. Gout
c. osteoporosis
b. myasthenia gravis
d. osteomalacia
Answer Key:
a. Gout
17. Acetabulum is located in
a. collar bone
b. hip bone
c. shoulder bone
d. thigh bone
b. hip bone
Answer Key:
b. hip bone
18. Appendicular skeleton is
a. girdles and their limbs
b. vertebrae
c. skull and vertebral column
d. ribs and sternum
a. girdles and their limbs
19. The type of movement exhibits by the macrophages are
a. flagellar
b. ciliary
c. muscular
d. amoeboid
Answer Key:
d. amoeboid
20. The pointed portion of the elbow is
a. acromion process
b. glenoid cavity
c. olecranon process
d. symphysis
Answer Key:
c. olecranon process
II. Short answer questions
aIII. Long answer questions
aIV. Exercise
a
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