Locomotion and movement

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NCERT Class 11 Biology Chapter wise Solutions

UNIT I:  DIVERSITY IN THE LIVING WORLD

• 1 : The Living World
• 2 : Biological Classification
• 3 : Plant Kingdom
• 4 : Animal Kingdom

UNIT II: STRUCTURAL ORGANISATION IN PLANTS AND ANIMALS

• 5 : Morphology of Flowering Plants
• 6 : Anatomy of Flowering Plants
• 7 : Structural Organisation in Animals

UNIT III: CELL: STRUCTURE AND FUNCTIONS

• 8 : Cell : The Unit of Life
• 9 : Biomolecules
• 10 : Cell Cycle and Cell Division

UNIT IV: PLANT PHYSIOLOGY

• 11 : Transport in Plants
• 12 : Mineral Nutrition
• 13 : Photosynthesis in Higher Plants
• 14 : Respiration in Plants
• 15 : Plant Growth and Development

UNIT V: HUMAN PHYSIOLOGY

• 16 : Digestion and Absorption
• 17 : Breathing and Exchange of Gases
• 18 : Body Fluids and Circulation
• 19 : Excretory Products and their Elimination
• 20 : Locomotion and Movement
• 21 : Neural Control and Coordination
• 22 : Chemical Coordination and Integration

NCERT Solutions For Class 11 Biology Chapter 20 Locomotion and movement

• 20.1 Types of Movement
• 20.2 Muscle
• 20.3 Skeletal System
• 20.4 Joints
• 20.5 Disorders of Muscular and Skeletal System

NCERT Solutions For Class 11 Biology Locomotion and movement

1. Draw the diagram of a sarcomere of skeletal muscle showing different regions.

2. Define sliding filament theory of muscle contraction.

3. Describe the important steps in muscle contraction.

4. Write true or false. If false change the statement so that it is true
(a) Actin is present in thin filament
(b) H-zone of striated muscle fibre represents both thick and thin filaments.
(c) Human skeleton has 206 bones.
(d) There are 11 pairs of ribs in man.
(e) Sternum is present on the ventral side of the body.

5. Write the difference between:
(a) Actin and Myosin
(b) Red and White muscles
(c) Pectoral and Pelvic girdle

6. Match Column I with Column II:

7. What are the different types of movements exhibited by the cells of human body?

8. How do you distinguish between a skeletal muscle and a cardiac muscle?

9. Name the type of joint between the following:-
(a) atlas/axis
(b) carpal/metacarpal of thumb
(c) between phalanges
(d) femur/acetabulum
(e) between cranial bones
(f) between pubic bones in the pelvic girdle

10. Fill in the blank spaces:

(a) All mammals (except a few) have __________ cervical vertebra.
(b) The number of phalanges in each limb of human is __________
(c) Thin filament of myofibril contains 2 ‘F’ actins and two other proteins namely __________ and __________.
(d) In a muscle fibre Ca++is stored in __________
(e) __________ and __________ pairs of ribs are called floating ribs.
(f) The human cranium is made of __________ bones.