Class 11 Biology - Chapter Locomotion and Movement NCERT Solutions | How do you distinguish between a skeleta
How do you distinguish between a skeletal muscle and a cardiac muscle?
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Skeletal muscle |
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Cardiac muscle |
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1. |
The cells of skeletal muscles are unbranched. |
1. |
The cells of cardiac muscles are branched. |
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2. |
Intercalated discs are absent. |
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The cells are joined with one another by intercalated discs that help in coordination or synchronization of the heart beat. |
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3. |
Alternate light and dark bands are present. |
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Faint bands are present. |
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4. |
They are voluntary muscles. |
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They are involuntary muscles. |
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5. |
They contract rapidly and get fatigued in a short span of time. |
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They contract rapidly but do not get fatigued easily. |
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6. |
They are present in body parts such as the legs, tongue, hands, etc.
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6. |
These muscles are present in the heart and control the contraction and relaxation of the heart.
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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:- 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:-
Describe the important steps in muscle contraction.
- Q:-
Draw the diagram of a sarcomere of skeletal muscle showing different regions.
- 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?
- Q:- 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.
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