The Reflex Arc (OCR GCSE Biology A (Gateway Science Suite)): Flashcards
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What is a reflex arc?
What is a reflex arc?
Pathway for nerve impulses producing reflex actions
Characteristics of reflex actions
Characteristics of reflex actions
Automatic and rapid responses
Purpose of reflex actions
Purpose of reflex actions
Protect body from harm
Role of receptors in reflex arc
Role of receptors in reflex arc
Detect stimuli (e.g., heat, light)
Where does sensory neuron go in reflex arc?
Where does sensory neuron go in reflex arc?
Spinal cord (CNS)
Role of relay neuron in reflex arc
Role of relay neuron in reflex arc
Passes impulse in CNS from sensory to motor neuron
Alternative name for relay neuron
Alternative name for relay neuron
Interneuron
What is an effector?
What is an effector?
Muscle or gland that responds in reflex arc
Why reflex responses are quick
Why reflex responses are quick
Don't involve conscious brain
Motor neuron role in reflex arc
Motor neuron role in reflex arc
Carries impulse to effector
Example: reflex to heat
Example: reflex to heat
Withdrawing hand from hot object
Example: eye reflex
Example: eye reflex
Blinking when something comes close