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If a muscle undergoes rapid contraction and relaxation the sarcoplasmic reticulum extension
Options
(a) Requires constant plugging in and out of Ca²⁺
(b) Rapid synthesis of myosin
(c) Do not require energy
(d) All of the above
Correct Answer:
Requires constant plugging in and out of Ca²⁺
Explanation:
Sarcoplasmic reticulum is specialized smooth endoplasmic reticulum of muscle cells which stores Ca⁺⁺ ions. During contraction phase of muscle, Ca⁺⁺ ions are released from sarcoplasmic lumen to sarcoplasm and during relaxation phase of muscle, Ca⁺⁺ ions are pumped back into lumen. Hence, if a muscle undergoes rapid contraction and relaxation it requires constant plugging in and out of Ca⁺⁺ ions from sarcoplasmic reticulum.
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Topics: Locomotion and Movement
(106)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A column of water within xylem vessels of tall trees does not break under its weight
- Which one of the following statements is wrong in case of Bhopal tragedy ?
- All plastids have similar structure because they can
- Match the following and select the correct answer:
- The partial oxygen pressure is maximum in
Topics: Locomotion and Movement (106)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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