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Reflex Arc

Topic 3: Reflex Arc

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Reflex Actions: Automatic Responses

Introduction 2

Key Facts

Key Facts 3

The Reflex Arc Pathway

Deep Dive 4

Required Practical: Measuring Reaction Time (RPA7)

Practical 5

Comparing Reflex Actions

Comparison 6

Memory Aid: Remembering the Reflex Arc Pathway

Memory Aid 7

Exam Tips

Exam Tips 8

How It Works: Why the Reflex Arc Bypasses the Brain

How It Works 9

Key Definitions

Definitions 10

Common Misconceptions

Memory Aids

Exam Focus

Knowledge Organiser

Exam Tips: Reflex Arc

Exam Tips

Sample Flashcards

What is a reflex action?

A reflex is a rapid, automatic response to a stimulus that does not involve conscious thought. Reflexes protect the body from harm.

What is the reflex arc pathway?

Stimulus → Receptor → Sensory neurone → Relay neurone (in spinal cord) → Motor neurone → Effector → Response.

Sample Questions

Which word best describes a reflex action?

A. Voluntary
B. Involuntary
C. Conscious
D. Deliberate

1 markfoundation

State the correct order of the reflex arc pathway from stimulus to response. Name each component.

3 marksstandard

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