Home > Muscles #2 Muscles #2 Welcome to your Muscles #2 Name email 1. The pigment which stores oxygen in muscles is: (2011) Haemoglobin Myoglobin Myosin Actinomyosin 2. The length of the myofibril from one Z-band to the next is known as Sarcomere Sarcolemma Sarcoplasm Muscle fiber 3. The thick filaments in a myofibril of muscles are made of (2019) Haemoglobin Myoglobin Actin Myosin 4. Thick filament in myofibril is made up of: Troponin Myosin Actin Tropomyosin 5. When more energy is required in muscle contraction then that energy can also be produced by as a secondary source (2014) Glucose Lactic acid Phosphocreatin Fructose 6. Muscle present in the gut wall are: Smooth Voluntary Cardiac Skeletal 7. The repeated protein pattern of myofibril is called: (2014) Sarcomere Zyomere Sarcolemma Cross bridges 8. Diameter of skeletal muscle fiber is: (2011) 2-50 µm 1-80 μm. 10-100 μm 30-90 μm 9. During muscle contraction (2010 & 2015) I-bands shorten A-bands broaden/ Z-line disappears H-zone becomes more visible / Myosin filaments shorten Z-lines move further apart / Actin filaments shorten 10. Over lapping of thick filament occurs in: (2017-Retake) A Band Z line M line I Band 11. Muscle is made up of many cells which are referred to as: (2011 & 2013) Myofilaments Myofibrils Sarcolemma Muscle fiber 12. The sarcolemma of muscle fiber folds inwards and forms a system of tubes which runs through the sarcoplasm called: (2015) Myofilament Sarcoplasmic reticulum Z-lines Transverse tubules 13. Which disease is caused by low calcium level in blood? (2008) Sciatica Tetany Muscle fatigue Cramp 14. Thin filaments of muscles contain chains of actin molecules. (2019) Four One Three Two 15. Which one of the following change occurs when skeletal muscle contracts? (2017) I-band shortens only I-band shortens and Z lines get closer A-band shortens and Z line moves farther apart Actin filament contracts 16. When calcium ions are released from the sarcoplasmic reticulum they bind with during muscle contraction: (2011, 2012 & 2013) Tropomyosin Sarcolemma/ Actin Cytosol's ions/ Myosin Troponin 17. A sarcomere is the region myofibril between two successive: (2015) M-lines Z-lines I-bands T-tubules 18. Muscle fatigue is due to accumulation of: Fats. Lactic acid ATP Glucose 19. Each muscle fibre is surrounded by a membrane called: (2012 & 2016) Sarcomere Capsule/ Myofilament Sarcolemma Twitch fibre/ Myosin filament 20. Each A-Band has a lighter strip in its mid-section called: A-zone H-zone M-line Z-line 1 out of 1 Please fill in the comment box below. Time is Up! Time's up