Biology Topic Practice
Components of a Reflex Arc
A reflex arc is the shortest pathway for an electrical impulse, ensuring rapid and protective responses.
What is the order of neurones in a reflex arc?
What is Components of a Reflex Arc?
"A reflex arc is a neural pathway that controls an action reflex, providing an immediate response to a stimulus."
Question 1
Why are reflex actions important?
Question 2
Which sequence shows the correct pathway for a reflex arc?
Question 3
Which sequence shows the correct pathway for a reflex arc?
The Pathway
Receptor detects a stimulus (e.g., heat).
Sensory neurone sends impulse to the relay neurone in the CNS.
Motor neurone sends impulse to the effector (muscle or gland).
Exam Tip
The key feature of a reflex is that it does NOT involve the conscious part of the brain.
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