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IB Biology HL B3.3.5 Hl Skeletons As Anchorage and Levers Questions

Practise explaining how skeletons support and protect organisms, how vertebrate tendons attach muscles to bones, and how arthropod muscles attach inside a chitin exoskeleton.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Explain how vertebrate bones provide support and act as levers, with skeletal muscles transmitting force to them through tendons at joints.
  • Compare vertebrate endoskeletons and arthropod exoskeletons by position, material and the side on which muscles attach.
  • Use joint or skeleton diagrams to identify tendon or muscle attachment and relate the arrangement to force production and movement.

IB Biology HL B3.3.5 Hl Skeletons As Anchorage and Levers Questions question 1

[Maximum number: 1]

The diagram shows a section through part of the leg of an insect and antagonistic muscles X and Y. The tibia moves in the direction shown by the arrow when the muscle is flexing.

Figure for Question IB Biology HL B3.3.5 Hl Skeletons As Anchorage and Levers Questions question 1 — IB Biology HL

Outline how the muscle attachment of insects differs from humans.

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