Class 11 Biology - Chapter Locomotion and Movement NCERT Solutions | Write true or false. If false change the
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.
(a) Answer: True
(b) Answer: False
H -zone of striated muscle fibre is the central part of the thick filament that is not overlapped by the thin filament.
(c) Answer: True
(d) Answer: False
There are 12 pairs of ribs in a man.
(e) Answer: True
More Questions From Class 11 Biology - Chapter Locomotion and Movement
- Q:- 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 - Q:-
How do you distinguish between a skeletal muscle and a cardiac muscle?
- Q:- 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. - Q:-
Draw the diagram of a sarcomere of skeletal muscle showing different regions.
- Q:-
Describe the important steps in muscle contraction.
- Q:-
Define sliding filament theory of muscle contraction.
- Q:-
Write the difference between:
(a) Actin and Myosin
(b) Red and White muscles
(c) Pectoral and Pelvic girdle - Q:- What are the different types of movements exhibited by the cells of human body?
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- Q:-
Which of the following is not correct?
(a) Robert Brown discovered the cell.
(b) Schleiden and Schwann formulated the cell theory.
(c) Virchow explained that cells are formed from pre-existing cells.
(d) A unicellular organism carries out its life activities within a single cell. - Q:- What are macromolecules? Give examples.
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Describe the structure of the following with the help of labelled diagrams.
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