Template explained - Feb 2021

A short paragraph in an introduction card

two sentences outlining the content of this sub-topic

(what is it about, and why it is useful).

Image 100x100 approx

Key concepts

A set of flashcards. I've embedded Quizlet but plkant to convert to the inhouse ones over time.
  11.2 Movement topic flash cards

What you need to know

This section used to be called "essentials"
It contains a set of revision pages as a gallery of slides to summarise the essential understanding and skills in the topic

 

Main points

This section has two parts, a revision list, basically the IB guide in student friendly language and a set of mind maps. One of these mindmaps is incomplete to be used as a starting point for home made revision activities. Mindmaps aren't for everyone, but they can be useful in Bio and some people like them.

Summary list for 11.2 Movement

Skeletons and muscles

  • Bones and exoskeletons (e.g. insect legs) provide anchorage for muscles and act as levers.
  • Synovial joints allow certain movements but not others.
  • Muscles work in antagonistic pairs.

Muscle contraction

  • Skeletal muscle fibres are multi-nucleate and contain
    • specialised endoplasmic reticulum.
    • many myofibrils.
    • made up of contractile sarcomeres.
  • The sliding of actin and myosin filaments causes contraction.
  • Contraction requires ATP hydrolysis and cross bridge formation
  • Calcium ions and the proteins tropomyosin and troponin control muscle contractions.

Skills & applications

  • Know how to annotate a diagram of the human elbow. Include cartilage, synovial fluid, joint capsule, named bones and named antagonistic muscles.
  • The ability to draw labelled diagrams of the structure of a sarcomere, including Z lines, actin filaments, myosin filaments with heads, and the resultant light and dark bands.
  • The ability to find the state of contraction of muscle fibres in electron micrographs,
  • Experience of measurement of the length of sarcomeres using calibration of the eyepiece scale of the microscope.

Mindmaps

This diagram summaries the main sections of topic 11.2 about movement.
Test if you can draw something like these concept maps from memory.

Exam style questions

Sarcomere structure

Understanding the structure of sarcomeres and their dark and light bands is an important skill from this topic.

Answer the question below on a piece of paper, then check your answer against the model answer below.

Grasshoppers jump using contraction of muscles in their legs. Explain the structure of myofibrils in muscles and the contraction of sarcomeres in the myofibrils. [8]

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Click the + icon to see a model answer.

Test yourself

Multiple Choice questions

This is a self marking quiz containing questions covering the topic outlined above.
Try the questions to check your understanding.  They are in a slide format, I tried the long scrolling quiz, in and also not in a hidden box, but I think this looks better.


START QUIZ!

Just for fun

Everyone needs a bit of fun while they revise. Try this Movement topic card matching game.
Can you reach the leader board?