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The functional unit of contractile syste...

The functional unit of contractile system in a striated muscle is

A

sarcomere

B

Z-band

C

cross bridges

D

myofibril

Text Solution

Verified by Experts

The correct Answer is:
A
Sarcomere is the functional unit of myofibril. It constains two types of protein filaments called actin and myosin. These filaments side upon each other to bring about the contraction of the muscles.
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NCERT FINGERTIPS-LOCOMOTION AND MOVEMENT-Locomotion And Movement
  1. Dark bands are

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  2. What is sarcomere ?

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  3. The functional unit of contractile system in a striated muscle is

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  4. Given below is the figure of a sarcomere. Identify the parts labelled ...

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  5. Which of the following statements about the striated muscle is incorre...

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  6. Which of the following sarcomeres is labelled correctly ?

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  7. The given figure represents the histology of of a striated muscle. Ide...

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  8. Match coloum I with coloum II and select the correct option from the c...

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  9. Read the given statements and select the correct option. Statement 1...

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  10. Which of the following contractile proteins contributes 55% of muscle ...

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  11. The given figure shows an actin (thin) filament. Identify the labelled...

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  12. Fill up the blanks in the following sentence by selecting the correct ...

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  13. Actin binding sites are located on

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  14. The given figure is related with myosin monomer (meromyosis). Identify...

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  15. Which of the following statements are correct regarding muscle protein...

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  16. Which of the following statements about the molecular arrangement of a...

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  17. Which one of the following options shows the next stage of muscle cont...

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  18. During muscular contraction, which of the following events occur? (i)...

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  19. The figures given here repesent three diferent conditions of sarcomere...

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  20. Following is given a randomly arranged list of events that occur at ne...

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