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247032
Reflex Action
Description
Revision for reflex actions. questions to get them thinking and then answers with them too
Mind Map by
Rohii Mia
, updated more than 1 year ago
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Created by
Rohii Mia
about 11 years ago
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Resource summary
Reflex Action
What is a reflex?
Why are reflexes so important?
Explain what is meant by a reflex action?
Automatic response
Explain why they are so important?
1. They help you avoid danger
They help with basic bodily functions
e.g. breathing, digestion
How do they work?
STIMULUS
RECEPTOR
Sensory neurone
Co-ordinator
which usually is the spinal cord or the unconscious part of brain
Relay neuron
Motor neuron
EFFECTOR
What 3 types of neurons are involved?
Sensory neuron
Motor neurone
Relay neuron
What is extra special about the reflex arc?
the impulse bypasses the conscious area of the brain
so the time between the stimulus and reflex action is = short
What is a synapse?
Nerves are not directly joined up
Gaps (junctions) in between them
How are messages sent through a synapse?
electrical impulses cannot jump/ leap
1. impulse arrives at a neuron
chemicals are released
Diffuse across
attatch to the next neuron and sends out a new impulse
How many neurons are involved in the normal way your body responds to change?
Media attachments
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13838365-human-nerve-cell-synapse-receptor-with-a-human-head-and-brain-and-a-magnification-of-an-anatomy-deta (image/jpg)
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