Solution of Chapter 20. Locomotion and Movement (Biology NCERT Book)

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

5 Write the differences between :(a) Actin and Myosin(b) Red and White Muscles(c) Pectoral and Pelvic Girdle.

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

7 How do you distinguish between a skeletal muscle and a cardiac muscle?