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sensitivity and coordination

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  • 1. U
    N
    I
    T
    2
    Sensitivity and
    COORDINATION. By Adrián Muñiz
  • 2. Stimuli and responses
    A stimulusisanythingthataffectsany of thebody’sactivities.
    There are two types of stimuli:
    INTERNAL: they come from inside our bodies.
    EXTERNAL: these come from outside the body.
    Response:
    ItIsthebodyanswerto a stimulus.
    e.g. Weeatwhenwe are hungry.
    Stimulus
    Response
  • 3. StimuliReceptors
    The body has different receptors to receive different types of stimuli.
    There are two types of receptors:
    Internal receptors. They receive the internal stimuli our bodies produce. They are all over the body.
    External receptors. They receive external stimuli. They are in the sensory organs.
    http://vimeo.com/7592583(Video)
  • 4. Responses
    Thebodyrespondstoanystimulus. There are twobasictypes of responses:
    Muscular responses: These are movementsthemusclesmake in response to a stimulus.
    Glandular responses: These are whenglands produce varioussubstances in response to a stimulus.
  • 5. THE SENSES (1)
    Sight:Theeyeisthebody’sorganforthesense of sight.Theeyeismade up of theeyeballand protectedbytheeyebrows,eyelids and eyelashes
    Hearing:Theearisthebody’sorganforthesense of hearing.Theear has threeparts: 1-The outerear2-The middleear3-The innerear
    Touch: Thebody’sorganforthesense oftouchistheskin.Theskinismade up of threelayers: 1-Epidermis 2-Dermis 3-Hypodermis
  • 6. THE SENSES (2)
    Smell:Thebody’sorganforthesense of smellisthenose.Thereceptors of smell are in thepituitary, a structureinsidethenostrils.Theorganforthesense of smellisthenose.
    Taste: Thebody’sorganforthesense of tasteisthetongue.Thereceptors of taste are in thetaste buds.
  • 7. THE NERVOUS SYSTEM AND HOW IT WORKS(1)
    Thenervoussystemreceives and interpretstheinformation of theinternal and externalreceptors,anditdevelops and transmits a response.Itismade up of nerves and nerve centres. Nervestransmitinformation. Theyare theperipheralnervoussystem. Thenerve centres interprettheinformation and develop responses. Theyformthecentral nervoussystem.
    The central nervoussystem: Ithas twoparts: Brain: Itisinsidetheskull.It has threemainparts:cerebrum,cerebellum and brainstem. Spinalcord:Itis a thickcordmade up of manyneuronsthatsgoesthroughtheinside of thespine.
  • 8. THE NERVOUS SYSTEM AND HOW IT WORKS(2)
    TheperipheralnervoussystemItismade up of nerves: Sensorynerves.Theytransmitinformationfromthesensoryorgans and internalorganstothe central nervoussystem. Motor nerves.Theytransmit responses fromthe central nervoussystemtothemuscles and glands of ourbodies.
  • 9. THE NERVOUS SYSTEM AND HOW IT WORKS(3)
    NeuronsNeurons are cellsthatbelongtothenervoussystem.Theyhave a star-likeshapemade up of threeparts :a cellbody,dendrites and axons.
  • 10. THE NERVOUS SYSTEM AND HOW IT WORKS(4)
    VOLUNTARY MOVEMENTS Thisishowthenervoussystemreactsto a stimuluswithvoluntarymovements. 1-Sense nerves2-Brain 3-Motor nerves
    InvoluntarymovementsWithinvoluntarymovementsorreflexes,itisthespinalcord and notthebrainthatdevelops a response
  • 11. Theend!!

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