Topic 11.2: Movement
Essential Idea: The roles of musculoskeletal system are movement, support and protection.
At SHS, Topic 11.2 is taught in the following class unit(s):
Statements & Objectives:
11.2.U1 Bones and exoskeletons provide anchorage for muscles and act as levers.
11.2.U2 Movement of the body requires muscles to work in antagonistic pairs.
1.2.U3 Synovial joints allow certain movements but not others.
11.2.U4 Skeletal muscles fibres are multinucleated and contain specialized endoplasmic reticulum.
11.2.U5 Muscle fibres contain many myofibrils.
11.2.U6 Each myofibrils is made up of contractile sarcomeres.
11.2.U7 The contraction of the skeletal muscle is achieved by the sliding of actin and myosin filaments.
11.2.U8 Calcium ions and the proteins tropomyosin and troponin control muscle contractions.
11.2.U9 ATP hydrolysis and cross bridge formation are necessary for the filaments to slide.
1.2.A1 Antagonistic pairs of muscles in an insect leg.
11.2.S1 Annotations of a diagram of the human elbow.
11.2.S2 Drawing labelled diagrams of the structure of a sarcomere.
11.2.S3 Analysis of electron micrographs to find the state of concentration of muscle fibres.
11.2.NOS Developments in scientific research follow improvements in apparatus-fluorescent calcium ions have been used to study the cyclic interactions in muscle contraction.
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