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Structural and functional unit of contractile apparatus in striated muscle is called
Options
(a) cross bridge
(b) myofibril
(c) Z-band
(d) sarcomere
Correct Answer:
sarcomere
Explanation:
Sarcomere is the functional unit of myofibril. It is the part of myofibril between two successive Z-lines, which consists of two I-band halves, and an A-band between them. The region contains a bundle of two types of protein filaments, actin and myosin. Upon contraction, the actin filaments slide towards the centre of the myosin filaments, and overall sarcomere length get smaller.
Related Questions: - The wheat grain has an embryo with one, large,shield-shaped cotyledon known as:
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Topics: Locomotion and Movement
(106)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The wheat grain has an embryo with one, large,shield-shaped cotyledon known as:
- The oxygen toxicity is related with
- Natural reservoir of phosphorus is :
- Which of the following fish was introduced in India by foreigners?
- In C plants the bundle sheath cells
Topics: Locomotion and Movement (106)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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