sensitivity and coordination

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sensitivity and coordination

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

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