The Human Nervous System (AQA GCSE Biology Combined Science): Flashcards
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What is a reflex arc?
What is a reflex arc?
Pathway of 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
What detects stimulus in reflex arc
What detects stimulus in reflex arc
Receptors
Where sensory neuron carries impulse to
Where sensory neuron carries impulse to
Spinal cord (part of CNS)
Which neuron is in spinal cord during reflex arc?
Which neuron is in spinal cord during reflex arc?
Relay neuron (interneuron)
Role of motor neuron in reflex arc
Role of motor neuron in reflex arc
Carries impulse to effector
What is an effector
What is an effector
Muscle or gland that responds
Why are reflex responses so fast?
Why are reflex responses so fast?
Don't involve conscious brain
Examples of reflex actions
Examples of reflex actions
Withdrawing hand from heat, blinking