Learning objective
Describe a reflex arc using the sequence stimulus, receptor, sensory neurone, relay neurone, motor neurone and effector.
Read the explanation, check the common trap, then practise with flashcards and questions.
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Topic
The human nervous system
Subtopic
Structure and function
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Quick explanation
Describe a reflex arc using the sequence stimulus, receptor, sensory neurone, relay neurone, motor neurone and effector
- This point belongs to The human nervous system, especially Structure and function.
- You need to be able to describe a reflex arc using the sequence stimulus, receptor, sensory neurone, relay neurone, motor neurone and effector.
- The key ideas to know are reflex arc, motor neurone, and sensory neurone.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
Why it matters
This objective helps connect Structure and function to exam-style questions, flashcards, and revision notes for The human nervous system.
Quick student answer
What are a reflex arc using the sequence stimulus, receptor, sensory neurone, relay neurone, motor neurone and effector?
Direct answer
In Biology, this page helps you answer questions about a reflex arc using the sequence stimulus, receptor, sensory neurone, relay neurone, motor neurone and effector within The human nervous system. Focus on the key process, correct scientific terms, and how the idea links to exam-style questions. Key terms to check are reflex arc and motor neurone.
Key terms
- reflex arc: The neural pathway that mediates a reflex action, consisting of a stimulus, receptor, sensory neurone, relay neurone, motor neurone, and effector.
- motor neurone: A type of neurone that transmits impulses from the central nervous system to effectors, such as muscles or glands, to bring about a response.
Common trap
Misunderstanding the Reflex Arc Sequence: To fix this, students should memorize the correct sequence of the reflex arc: stimulus, receptor, sensory neurone, relay neurone, motor neurone, and effector. Visual aids or diagrams can help reinforce this order.
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Revision notestopic notes
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Open revision notesRelated learning objectives
- Describe the nervous system as a system that enables humans to react to their surroundings and coordinate behaviour.
Structure and function
- Describe the pathway in which receptor cells detect stimuli, sensory neurones carry impulses to the CNS, the CNS coordinates a response and motor neurones carry impulses to effectors.
Structure and function
- Explain that the brain and spinal cord form the central nervous system.
Structure and function
- Describe muscles and glands as effectors that bring about responses, with muscles contracting and glands secreting hormones.
Structure and function
- Explain why reflex actions are automatic and rapid protective responses that do not require conscious thought.
Structure and function