Home > Muscles #2 Muscles #2 Welcome to your Muscles #2 Name email 1. 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 2. Thin filaments of muscles contain chains of actin molecules. (2019) Four One Three Two 3. 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 4. Which disease is caused by low calcium level in blood? (2008) Sciatica Tetany Muscle fatigue Cramp 5. 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 6. Muscle fatigue is due to accumulation of: Fats. Lactic acid ATP Glucose 7. A sarcomere is the region myofibril between two successive: (2015) M-lines Z-lines I-bands T-tubules 8. Each A-Band has a lighter strip in its mid-section called: A-zone H-zone M-line Z-line 9. Muscle is made up of many cells which are referred to as: (2011 & 2013) Myofilaments Myofibrils Sarcolemma Muscle fiber 10. The repeated protein pattern of myofibril is called: (2014) Sarcomere Zyomere Sarcolemma Cross bridges 11. Each muscle fibre is surrounded by a membrane called: (2012 & 2016) Sarcomere Capsule/ Myofilament Sarcolemma Twitch fibre/ Myosin filament 12. Thick filament in myofibril is made up of: Troponin Myosin Actin Tropomyosin 13. Muscle present in the gut wall are: Smooth Voluntary Cardiac Skeletal 14. The thick filaments in a myofibril of muscles are made of (2019) Haemoglobin Myoglobin Actin Myosin 15. Over lapping of thick filament occurs in: (2017-Retake) A Band Z line M line I Band 16. 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 17. 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 18. The pigment which stores oxygen in muscles is: (2011) Haemoglobin Myoglobin Myosin Actinomyosin 19. The length of the myofibril from one Z-band to the next is known as Sarcomere Sarcolemma Sarcoplasm Muscle fiber 20. Diameter of skeletal muscle fiber is: (2011) 2-50 µm 1-80 μm. 10-100 μm 30-90 μm 1 out of 1 Please fill in the comment box below. Time is Up! Time's up