Topic 11.2: Movement
- The roles of the musculoskeletal system are movement, support and protection.
Nature of science:
- Developments in scientific research follow improvements in apparatus—fluorescent calcium ions have been used to study the cyclic interactions in muscle contraction. (1.8)
11.2 U 1 Bones and exoskeletons provide anchorage for muscles and act as levers.
11.2 U 2 Synovial joints allow certain movements but not others.
11.2 U 3 Movement of the body require1s muscles to work in antagonistic pairs.
11.2 U 4 Skeletal muscle fibres are multinucleate and contain specialized endoplasmic reticulum.
11.2 U 5 Muscle fibres contain many myofibrils.
11.2 U 6 Each myofibril is made up of contractile sarcomeres.
11.2 U 7 The contraction of the skeletal muscle is achieved by the sliding of actin and myosin filaments.
11.2 U 8 ATP hydrolysis and cross bridge formation are necessary for the filaments to slide.
11.2 U 9 Calcium ions and the proteins tropomyosin and troponin control muscle contractions.
11.2 A 1 Antagonistic pairs of muscles in an insect leg
11.2 S 1 Annotation of a diagram of the human elbow.
11.2 S 2 Drawing labelled diagrams of the structure of a sarcomere.
11.2 S 3 Analysis of electron micrographs to find the state of contraction of muscle fibres.
In The News
In The News
Alex Lee discusses Topic 11.2