The Reflex Arc (OCR GCSE Biology A, Combined (Gateway Science Suite)): Flashcards
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Reflex arc definition
Reflex arc definition
Pathway of nerve impulses producing a reflex action
Reflex action characteristics
Reflex action characteristics
Automatic and rapid responses
Purpose of reflex actions
Purpose of reflex actions
Protect body from harm
What detects stimulus in reflex arc
What detects stimulus in reflex arc
Receptors
Sensory neuron destination in reflex arc
Sensory neuron destination in reflex arc
Spinal cord (CNS)
Neuron connecting sensory & motor neurons in CNS
Neuron connecting sensory & motor neurons in CNS
Relay neuron (interneuron)
Neuron carrying impulse to effector
Neuron carrying impulse to effector
Motor neuron
Types of effectors in reflex arc
Types of effectors in reflex arc
Muscle or gland
Why are reflex arcs faster than conscious responses
Why are reflex arcs faster than conscious responses
Don't involve conscious brain, allowing quicker protection
Reflex action example: heat stimulus
Reflex action example: heat stimulus
Withdrawing hand from hot object
Reflex action example: object near eyes
Reflex action example: object near eyes
Blinking
Reflex arc pathway order (5 stages)
Reflex arc pathway order (5 stages)
Receptor→sensory→relay→motor→effector