Human Physiology – Locomotion and Movement Quiz - ICSE Class 11 Biology

Free practice quiz: Human Physiology – Locomotion and Movement (ICSE Class 11 Biology). 44 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. During muscle contraction, the binding of calcium ions to troponin results in:

   1. The blocking of myosin-binding sites on actin.
   2. The release of ADP from myosin.
   3. The uncovering of myosin-binding sites on actin.
   4. The hydrolysis of ATP by actin.
   Show answer

   Answer: C. The uncovering of myosin-binding sites on actin.

   Calcium ions bind to troponin, which causes a conformational change in tropomyosin, thereby exposing the myosin-binding sites on the actin filaments.

2. Which of the following is a characteristic of slow-twitch muscle fibers (Type I)?

   1. High myoglobin content and resistance to fatigue
   2. Rapid force generation and susceptibility to fatigue
   3. Predominant reliance on anaerobic glycolysis
   4. Few mitochondria and small motor units
   Show answer

   Answer: A. High myoglobin content and resistance to fatigue

   Slow-twitch fibers are rich in myoglobin (which stores oxygen) and mitochondria, allowing for sustained aerobic respiration. They contract slowly but are highly resistant to fatigue.

3. Osteoporosis is a condition characterized by:

   1. Excessive bone formation
   2. Decreased bone mass and density, leading to increased fracture risk
   3. Inflammation of the joints
   4. Overgrowth of cartilage
   Show answer

   Answer: B. Decreased bone mass and density, leading to increased fracture risk

   Osteoporosis is a systemic skeletal disease characterized by low bone mass and microarchitectural deterioration of bone tissue, resulting in increased bone fragility and susceptibility to fractures.

4. The isometric contraction of a muscle occurs when:

   1. The muscle shortens, and the load is moved.
   2. The muscle lengthens, and the load is moved.
   3. The muscle generates tension, but its length does not change.
   4. The muscle shortens without generating significant tension.
   Show answer

   Answer: C. The muscle generates tension, but its length does not change.

   In an isometric contraction, the muscle produces force but does not shorten or lengthen. The tension generated is not enough to overcome the resistance, or the joint angle is being held steady.

5. Which of the following bone markings is a projection that serves as a point of attachment for muscles or ligaments?

   1. Fossa
   2. Foramen
   3. Tubercle
   4. Sinus
   Show answer

   Answer: C. Tubercle

   A tubercle is a small, rounded projection on a bone that serves as an attachment site for muscles and ligaments. Fossae are depressions, foramina are openings, and sinuses are air-filled cavities.

More quizzes

• Human Physiology – Neural Control and Coordination
• Plant Physiology – Plant Growth & Development
• Plant Physiology – Respiration in Plants
• Plant Physiology – Transport in Plants
• Structural Organisation – Anatomy of Flowering Plants
• Structural Organisation – Morphology of Flowering Plants

Browse all Biology quizzes