Structure of skeletal muscle - class-XI
Description: structure of skeletal muscle | |
Number of Questions: 24 | |
Created by: Sara Dalvi | |
Tags: animal physiology tissues coordination organisation of tissues introduction to biotechnology musculo-skeletal system movement and locomotion in man zoology biology |
Which of the following is multinucleated?
On stimulation of skeletal muscle, calcium is immediately made available for binding to troponin from
Read the following statements carefully and select the correct ones.
(i) Cardiac fibres are branched with one or more nuclei.
(ii) Smooth muscles are unbranched and cylindrical.
(iv) Smooth muscles are non-striated.
The cytoplasm in the muscle fibre is called as
All or none law is not applicable for?
The thickness of a striated muscle fibre increases________.
Striated muscles are found in
What is sarcomere?
Find out the correct sequence of muscle structures/components present one within the other
The protoplasmic segment of a striated muscle fibre is termed as
Contractile fibrils of muscles are called
End plate junction is present between
Sarcomere is the functional unit of contraction in a muscle fibre. Identify the portion of myofibril that constitutes a sarcomere
An animal cell with numerous nuclei is called
Anisotropic band is made of
Skeletal muscles are controlled by
H-zone in skeletal muscle fibre is due to
Identify the correct statements.
2. I-bands are light and contain actin.
3. During the action, A band contracts.
4. The part between two Z-lines is sarcomere.
5. The central part of thin filament, not overlapped by thick filament is the H-zone.
Myofibrils show dark and light bands in
Cross bridges of sarcomere in skeletal muscle are made up of
State whether the following statements are true or false.
Intercalated discs make up striations in the skeletal muscle.
Which muscles having functionally multinucleated conditions?
Consider the following statements each with one or two blanks.
(i) Each half of pectoral girdle consists of a (A) and a (B)
(ii) (C) is a condition of rapid spasms (wild contractions) in muscle due to low $Ca^{++}$ in body fluid.
(iii) Each organised skeletal muscle In our body is made of a number of (D) held together by a common collagenous connective tissue layer called (E) Which one of the following options correctly fills the blanks in any two of the statements ?