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IB Biology HL C3.1.7 Output Through Motor Neurons Questions

Explore how motor-neuron signals leave the CNS, activate skeletal muscles and coordinate voluntary movement through cerebral-hemisphere control in IB Biology HL C3.1.7.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • State that motor neurons carry impulses from the central nervous system to skeletal-muscle effectors.
  • Explain that voluntary muscle contraction is coordinated through the cerebral hemispheres and motor output to the selected effector.

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Study C3.1.7—Output through motor neurons conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL C3.1.7 Output Through Motor Neurons Questions question 1

[Maximum number: 1]

What is the main role of nerves in human movement?

A

To cause muscles to stretch

B

To move joints

C

To transport pain signals that indicate muscle injuries

D

To stimulate muscle contraction

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