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Reflex Action

Description

Revision for reflex actions. questions to get them thinking and then answers with them too
Rohii Mia
Mind Map by Rohii Mia, updated more than 1 year ago
Rohii Mia
Created by Rohii Mia almost 12 years ago
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Resource summary

Reflex Action
  1. What is a reflex?
    1. Why are reflexes so important?
      1. Explain what is meant by a reflex action?
        1. Automatic response
        2. Explain why they are so important?
          1. 1. They help you avoid danger
            1. They help with basic bodily functions
              1. e.g. breathing, digestion
          2. How do they work?
            1. STIMULUS
              1. RECEPTOR
                1. Sensory neurone
                  1. Co-ordinator
                    1. which usually is the spinal cord or the unconscious part of brain
                      1. Relay neuron
                        1. Motor neuron
                          1. EFFECTOR
              2. What 3 types of neurons are involved?
                1. Sensory neuron
                  1. Motor neurone
                    1. Relay neuron
                2. What is extra special about the reflex arc?
                  1. the impulse bypasses the conscious area of the brain
                    1. so the time between the stimulus and reflex action is = short
                  2. What is a synapse?
                    1. Nerves are not directly joined up
                      1. Gaps (junctions) in between them
                    2. How are messages sent through a synapse?
                      1. electrical impulses cannot jump/ leap
                        1. 1. impulse arrives at a neuron
                          1. chemicals are released
                            1. Diffuse across
                              1. attatch to the next neuron and sends out a new impulse
                      2. How many neurons are involved in the normal way your body responds to change?
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