Tiêu đề Locomotion n movement Q n A.pdf ✅

33 2023 March 1. The processes involved in muscle contraction are given below. Arrange them in correct sequential order. (The first step is given correct). • A signal sent out by CNS. • Binding of Ca++ with troponin. • Release of a neurotransmitter. • Remove the masking of active sites for myosin. • Release of Ca++ into Sarcoplasm. (Score 2)  Answer A signal sent out by CNS. ↓ Release of a neurotransmitter. ↓ Release of Ca++ into Sarcoplasm. ↓ Binding of Ca++ with troponin. ↓ Remove the masking of active sites for myosin. 2. (a) Write any two types of synovial joints. (b) Identify its location. (Score 2)  Answer a) 1. Ball and socket joint 2. Hinge joint b) Location of Ball & socket joint: Shoulder joint, hip joint. Location of Hinge joint: Elbow joint, knee joint. 2022 June 1. Enlist three differences between Red muscle fibre and White muscle fibres. (Score 3)  Answer Red muscle fibre White muscle fibre More myoglobin. Lesser myoglobin. More mitochondria. Less mitochondria. Slow & sustained contraction. Fast contraction for short period. 2022 January 1. Name the type of synovial joints present in following body parts: (a) Knee joint (b) Between atlas and axis (c) Between adjacent carpels (d) Between carpels and metacarpals (Score 2)  Answer a) Hinge joint b) Pivot joint c) Gliding joint d) Saddle joint 2. Name the mineral ion which play crucial role in muscle contraction. Explain its role. (Score 2)  Answer Calcium ion. Calcium ions bind to troponin, facilitating the interaction between actin and myosin filaments. It leads to muscle contraction. 3. Find out the suitable term from the box for the symptoms stated. (Score 2) a. Wild contractions in the muscle due to low Ca++ in the body fluid. b. Inflammation of joints. c. Decreased bone mass and increased chance of fracture. d. Inflammation of joints due to accumulation of uric acid crystal. Arthritis, Tetany, Muscular dystrophy, Osteoporosis, Gout  Answer a) Tetany b) Arthritis c) Osteoporosis d) Gout 2021 September 1. Give two examples for each of the following: (a) Synovial joints (b) Muscle proteins (Score 2)  Answer a) Ball and socket joint, Hinge joint. b) Actin and myosin. 2. The name of different bones, seen in forelimb and hindlimb are given below. Arrange them in two columns. (Score 2) (Humerus, Tibia, Carpals, Fibula)  Answer Bones of forelimb Bones of hindlimb Humerus Carpals Tibia Fibula 3. Draw a flow chart, showing the physiological processes involved in the formation of cross bridges during muscle contraction. (Score 2)  Answer Impulse from CNS to Neuromuscular junction → Synaptic vesicles release Acetylcholine → Generation of action potential in sarcolemma → Release of Ca2+ ions → Ca binds with troponin → Active sites of actin are exposed → Myosin head binds to active sites to form cross bridge → Actin filaments are pulled towards H-zone → H-zone disappears and sarcomere contracts.
34 2020 March 1. Name the portion of the myofibril between two successive Z-lines. (Score 1) (a) H-zone (b) Sarcomere (c) I-band (d) M-line  Answer: (b) Sarcomere 2. Cells of human body perform different types of movement. Write any two types of movement and the parts that exhibit the movement. (Score 2)  Answer Amoeboid movement: E.g. Macrophages & leucocytes. Ciliary movement: E.g. ciliary movements in trachea. 2020 Model 1. (a) Name any two synovial joints in our body. (b) Where is it located? (Score 2)  Answer a) Ball and socket joint, Hinge joint. b) Ball and socket joints are located in shoulder, hip etc. Hinge joints are located in elbow, knee etc. 2019 July 1. Name-of the bones of appendicular skeleton are given below. (Score 2) Clavicle Humerus Tibia Patella Scapula a. Select the bones of pectoral girdle. b. Name the articulating cavity between femur and pelvic girdle.  Answer (a) Clavicle, Scapula. (b) Acetabulum. 2. Major steps involved in muscle contraction are given below, which are not in the correct order. Arrange them in the correct order. (Score 2) a. Remove the mask of active sites for binding myosin ↓ b. A signal sent out by CNS ↓ c. Binding of Ca2+ with troponin ↓ d. Release of a neuro-transmitter substance ↓ e. Release of Ca2+ into the sarcoplasm  Answer a. A signal sent out by CNS ↓ b. Release of a neuro-transmitter substance ↓ c. Release of Ca2+ into the sarcoplasm ↓ d. Binding of Ca2+ with troponin ↓ e. Remove the mask of active sites for binding myosin 2019 March 1. Observe the figures given below: a) Identify figure 'A' and 'B'. b) Name the subunits of 'A' and 'B'. (Score 2)  Answer (a) A= Actin, B= Myosin. (b) A= G- actin, B= Meromyosin (HMM + LMM) 2019 Model 1. Complete the division of human skeletal system by- filling the blanks. (Score 2)  Answer (a) Axial (b) Vertebral column (c) 12 (d) 1 2018 August 1. Identify the disorders based on the symptoms given below. (Score 2) a. Inflammation of joints. b. Decreased bone mass and increased chance of fracture. c. Inflammation of joints due to the accumulation of uric acid crystals. d. Rapid spasms in muscles due to low Ca++ in body fluids.  Answer (a) Arthritis (b) Osteoporosis (c) Gout (d) Tetany 2. Select the WRONG statement regarding muscles from those given below and correct it. (Score 2) a. Each muscle fibre is lined by the plasma membrane called sarcolemma. b. The light bands are called 'A' band or Anisotropic band. c. The Portion of the myofibril between two successive 'Z' lines is called a sarcomere. d. Muscle contains a red coloured oxygen storing Pigment is called' myoglobin.
35  Answer b. The light bands are called ‘A’ band or Anisotropic band. Correction: The light bands are called ‘I’ band or Isotropic band. 2018 March 1. Select the bones of the leg from the given list of bones. (Score 2) Humerus, Tibia, Radius, Femur, Tarsals, Ulna, Fibula, Carpels  Answer Tibia, Femur, Tarsals, Fibula. 2018 Model 1. How does the increased level of calcium ion in the sarcoplasm help in muscle contraction? (Score 2)  Answer Ca ion binds with a subunit of troponin on actin filaments and unmask the active sites for myosin. Using energy from ATP hydrolysis, myosin head binds to active sites on the actin to form cross bridge. 2. Certain disorders and their causes are given. Match them suitably. (Score 2) • Myasthenia gravis • Inflammation of joints • Tetany • Autoimmune disorder • Muscular dystrophy • Low calcium ions in body fluid. • Genetic disorder.  Answer • Myasthenia gravis • Autoimmune disorder • Tetany • Low calcium ions in body fluid • Muscular dystrophy • Genetic disorder 2017 July 1. An athlete met an accident on the ground. His thigh bone slipped off from the girdle. a. Write the name of the above-mentioned girdle? b. Identify the type of joint that slipped off? c. Name the disorder caused due to the accumulation of uric acid crystals in such a joint? (Score 2)  Answer (a) Pelvic girdle. (b) Ball and socket joint. (c) Gout. 2017 March 1. Compete the following chart showing structure of myosin filament and its protein based on the hints given in the brackets. (Score 2) (Light meromyosin, Actin, Tropomyosin, Meromyosin)  Answer (A) Meromyosin (B) Light meromyosin 2016 March 1. “A contracted muscle becomes shorter and thicker but its volume remains the same.” (Score 2) a) Which theory explains the process of muscle contraction? b) Identify two contractile proteins seen in muscle.  Answer (a) Sliding Filament Theory. (b) Actin and Myosin. 2015 September (Improvement) 1. Based on the diagram given below, can you write down the structural changes occurring in sarcomeres during muscular contraction? (Hint: Any 2 changes). (Score 2)  Answer • Actin filaments are pulled towards the centre of A- band. • Sarcomeres are shortened. 2015 March 1. Red muscle fibres have greater capacity to do work for a prolonged period, whereas white muscle fibres suffer from fatigue after a short work. Evaluate the statement. (Score 2)  Answer Red muscles have aerobic metabolism and slow and sustained contraction. White muscles have anaerobic metabolism and fast contraction for short period. Want more materials? Click Here