Reflex Action (Leaving Cert Biology): Flashcards
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11 cards from this deck
Reflex action definition
Reflex action definition
Automatic, involuntary, unthinking response to stimulus
Reflex action examples
Reflex action examples
Knee jerk, sneezing
Components of reflex arc
Components of reflex arc
Sensory neuron, interneuron, motor neuron
Common reflex example
Common reflex example
Hand pulling away from hot object
Purpose of reflex arcs
Purpose of reflex arcs
Fast responses to protect body from damage
First step in reflex action
First step in reflex action
Receptors in fingers stimulated by hot object
Sensory neuron role in reflex
Sensory neuron role in reflex
Carries impulse from receptors to spinal cord
Interneuron role in reflex
Interneuron role in reflex
Carries impulse across spinal cord to motor neuron
Motor neuron role in reflex
Motor neuron role in reflex
Carries impulse to effector from spine
Effector response in hand reflex
Effector response in hand reflex
Hand pulls back from heat source
When does awareness occur in reflex?
When does awareness occur in reflex?
When impulse reaches brain as hand withdraws