Unit 4: Movement Analysis - Cabarrus County Schools



Unit 4.1Neuromuscular functionKey learning intention (KLI)To understand how muscles move and what makes athletes differ in terms of their physiological make-up in regards to muscles.Success criteriaI can produce a video which outlines how muscle fibres are innervated and how fibres differ in structure and function for different athletes.ResourcesP75-81Key wordsAxon, neuromuscular junction, dendrite, nucleus, motor unit, troponin, tropomyosin, sarcoplasmic reticulum, myosin, actin, cholinesterase, acetylcholine,Let’s start by seeing what your work at the end of this unit should look like. Here’s the video that one of last year’s groups produced.Maybe your already feel you can do something similar but over the next few lessons you will fill in any gaps in your knowledge so you can explain in perfect detail exactly how we move.First were going to watch a fantastic video that presents the muscular system brilliantly. Read through what is required for the rest of this unit so you know what you’re looking for before watching the video.031750063500447675004.1.1.Label a diagram of a motor unit1658679544875800What is the contractile unit of muscle called?Define what the following terms represent;H ZoneA BandZ lineComponentDescriptionAxonDendriteCell bodyNucleussynapseNeuromuscular junctionDraw your own version in the space below 4.1.3.Explain how skeletal muscle contracts using the sliding filament theory.You now need to match the statements in the boxes below to the pictures in the table. Using the resources provided below and Mr Doyle’s plasticine demonstration, cut and paste the correct statements into the correct boxes.The motor neuron initiates a resting potential through repoliraziation. Cholinesterase, an enzyme that breaksdown acetylcoline, is released and cause the muscle cell to replorize and relax.Cross bridge formation is termimated as there is no calcium which means the myosin binding sites on the actin filament are covered by tropomyosin. ATP Return the myosin heads to a resting state.Myosin binding sites on actin are covered by tropomyosin. Calcium binds to troponin on the tropomyosin which causes it to move and reveal the mysosin binding sites on the actin. In the presence of magnesium, ATP on the Mysoin head is hydrolysed to form ADP + Phosphatecalcium ions are removed from the cell and returned to the sacrosplasmic reticulum via the calcium pumpcalcium is released from the sarcoplasmic reticulum into the muscle cell.The cell membrane is depolarised (positive inside/negative outside) and acetylcholine (neurotransmitter) is released. This allows sodium into the cell and increases the cells permeability.Each muscle contraction begins with an electrochemical reaction arriving at the cell membrane (neuromuscular junction). Cross bridge formed. Myosin head remains bound until ATP molecule releases it. As long as there is calcium available cross bridge formation will continue until maximum contraction of the muscle fibre is reached.TRY THESE VIDEOS TO AID YOU IN YOUR UNDERSTANDINGVIDEO ONEVIDEO TWOMatch the statements to the correct picture (cut and paste)41910-635000-2540001060452857500Now complete the ‘sliding filament theory steps gone bad’ document in the unit four folder in edmodo.Remember, you are trying to identify which parts of the process are incorrect.Explain how fast and slow twitch fibres differ in structure and functionBefore you complete the table below discuss with your classmates and teachers how fibre types might differ for different types of athletes. What are the physiological requirements that allow athletes to be successful is different types of athletic events i.e. marathon runner and a sprinter.Type IType IIaType IIbContraction timeFastResistance to fatiguehighForce productionVery highEnergy systemLong term anaerobicMitochondrial densityHighCapillary densityHighOxidative capacityIntermediateGlycolytic capacityHighMajor storage fuelCreatine phosphateSize of motor neuronsmallUnit 4.1Neuromuscular functionKey learning intention (KLI)To understand how muscles move and what makes athletes differ in terms of their physiological make-up in regards to muscles.Success criteriaI can produce a video which outlines how muscle fibres are innervated and how fibres differ in structure and function for different athletes.You have finished unit 4.1, you should now be able to achieve the success criteria above.How about some quick revision before you complete the end of unit assessment. Now go to edmodo and complete the end of unit assessment. If you score more than 90% you can move onto the next unit. Feedback will be given within 24 hours.-2552708234045INDIVIDUAL-COACTIVE-INTERACTIVE00INDIVIDUAL-COACTIVE-INTERACTIVE30994357806055DISCRETE-SERIAL-CONTINUOUS00DISCRETE-SERIAL-CONTINUOUS ................
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