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NCERT solutions Biology Textbook for Class 11 chapter 20 Locomotion and Movement

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Chapter 20 - Locomotion and Movement

Pages 313 - 314

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

Q 1 | Page 313 |

Define sliding filament theory of muscle contraction.

Q 2 | Page 313 |

Describe the important steps in muscle contraction.

Q 3 | Page 313 |

Write true or false. If false change the statement so that it is true.

 Actin is present in thin filament

Q 4.1 | Page 314 |

Write true or false. If false change the statement so that it is true.

H-zone of striated muscle fibre represents both thick and thin filaments

Q 4.2 | Page 314 |

Write true or false. If false change the statement so that it is true.

Human skeleton has 206 bones.

Q 4.3 | Page 314 |

Write true or false. If false change the statement so that it is true.

There are 11 pairs of ribs in man.

 

Q 4.4 | Page 314 |

Write true or false. If false change the statement so that it is true.

Sternum is present on the ventral side of the body.

Q 4.5 | Page 314 |

Write the difference between : Red and White muscles

Q 5.2 | Page 314 |

Write the difference between: Pectoral and Pelvic girdle

Q 5.3 | Page 314 |

Match Column I with Column II :

  Column I   Column II
a Smooth muscle 1 Myoglobin
b Tropomyosin 2 Thin filament
c Red muscle 3 Sutures
d Skull 4 Involuntary
Q 6 | Page 314 |

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

Q 7 | Page 314 |

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

Q 8 | Page 314 |

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 9 | Page 314 |

Fill in the blank spaces:

All mammals (except a few) have __________ cervical vertebra.

Q 10.1 | Page 314 |

Fill in the blank spaces:

The number of phalanges in each limb of human is __________

Q 10.2 | Page 314 |

Fill in the blank spaces:

Thin filament of myofibril contains 2 ‘F’ actins and two other proteins namely __________ and __________.

Q 10.3 | Page 314 |

Fill in the blank spaces:

In a muscle fibre Ca++ is stored in __________

Q 10.4 | Page 314 |

Fill in the blank spaces:

 __________ and __________ pairs of ribs are called floating ribs.

Q 10.5 | Page 314 |

Fill in the blank spaces:

The human cranium is made of __________ bones.

Q 10.6 | Page 314 |

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