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Class 11 Biology NCERT Solutions For Chapter 20 Locomotion and Movement

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Download NCERT Solutions for Class 11 Biology

Chapter 20 Locomotion and Movement

(Link of Pdf File is given below at the end of the Questions list)

In this pdf file you can see answers of following Questions

 

Question 1:
Draw the diagram of a sarcomere of skeletal muscle showing different regions.
Question 2:
Define sliding filament theory of muscle contraction.
Question 3:
Describe the important steps in muscle contraction.
Question 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.
Question 5:
Write the difference between:
(a) Actin and Myosin
(b) Red and White muscles
(c) Pectoral and Pelvic girdle
Question 6:
Match Column I with Column II :

Question 7:
What are the different types of movements exhibited by the cells of human body?
Question 8:
How do you distinguish between a skeletal muscle and a cardiac muscle?

Question 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
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Question 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.

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