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Which of the following ions help in muscle contraction?
Options
(a) K⁺ and Mg⁺⁺
(b) Na⁺ and K⁺
(c) Ca⁺⁺ and Na⁺
(d) Ca⁺⁺ and Mg⁺⁺
Correct Answer:
Ca⁺⁺ and Mg⁺⁺
Explanation:
Ca²⁺ as well as Mg⁺⁺ help in muslce contraction. Actin and myosin get combined in presence of ATP and Ca²⁺ to form actomyosin to Myosin + Actin –ATP/Ca²⁺—> Actomysin Energy released by the oxidation of food in the form of ATP is broken down into ADP, phosphorus and energy in the presence of enzyme myosin ATPase, Ca²⁺ and Mg²⁺ions. ATP + H₂O —myosin ATPase/Ca²⁺,Mg²⁺—–> ADP + Pi+ Energy The energy is used up in the contraction of muscle.
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Topics: Locomotion and Movement
(106)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which one of the following is a single membrane structure?
- Which of the most stable product formed with haemoglobin?
- What happens during fertilisation un humans after many sperms reach close to the ovum?
- When man eats fish which feeds on zooplankton which have eaten small plants
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Topics: Locomotion and Movement (106)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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