Locomotion and Movement
ICSE · Class 11 · Biology
Practice quiz for Locomotion and Movement — ICSE Class 11 Biology. MCQs and questions with answers to test your preparation.
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How many bones are there in the adult human body?
What type of movement is shown by Amoeba?
What is the functional unit of muscle contraction?
Which protein forms the thick filaments in skeletal muscle?
Sample Questions
What type of joint is found at the shoulder?
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d
The shoulder joint is a ball-and-socket (multiaxial) joint allowing movement in all directions. The hip joint is also a ball-and-socket joint. Therefore, the correct answer is option (4) Ball-and-socket joint.
What is the role of calcium ions (Ca²⁺) in muscle contraction?
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b
Ca²⁺ released from sarcoplasmic reticulum binds to troponin C, causing the troponin-tropomyosin complex to shift and expose the myosin-binding sites on actin filaments. Therefore, the correct answer is option (2) Bind to troponin to expose actin binding sites.
Which of the following is a hinge joint?
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d
The elbow joint is a hinge joint that allows only flexion and extension (uniaxial movement). The knee is also a hinge joint. Therefore, the correct answer is option (4) Elbow joint.
What is rigor mortis?
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Sustained muscle contraction after death due to absence of ATP
Rigor mortis is stiffening of muscles after death. Without ATP, myosin heads cannot detach from actin → muscles become rigid. Begins 3–6 hours after death. Therefore, the correct answer is option (2) Sustained muscle contraction after death due to absence of ATP.
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