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The Senses

The Senses. TRUE OR FALSE: You hear with your ears, taste with your tongue, and see with your eyes. False. Your ears, eyes, tongue etc collect stimuli, but your brain interprets the Stimuli. Sense: Hearing Ear Anatomy. Pinna Outer ear Eardrum

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The Senses

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  1. The Senses

  2. TRUE OR FALSE: You hear with your ears, taste with your tongue, and see with your eyes. False Your ears, eyes, tongue etc collect stimuli, but your brain interprets the Stimuli.

  3. Sense: HearingEar Anatomy • Pinna • Outer ear • Eardrum • Amplifies sound by 3 bones: malleus, incus, stapes • Cochlea • Contains mechanoreceptors (measures pressure)

  4. SoundTransmission 1) Sound waves (vibration of the air) enters the ear canal 2) Eardrum & the small bones vibrate 3) Fluid in the cochlea vibrates 4) Hair cells in the cochlea bend 5) Impulse transmitted through the auditory nerve and to the brain

  5. Sound Transition Animation

  6. Sense: SightEye Anatomy • Cornea • Protective layer of the eye • Iris • Colored part of the eye • Contains muscles to open & close the pupil • Pupil • Size adjusts with light • Small: more light present • Large: less light present • Lens • Focuses light onto the retina • Retina • Back of the eye • Contains photoreceptors • Rods- detect absence of light (b & w) • Cones- detect color • Optic Nerve • Sends impulses to brain

  7. Vision Process #3 • 1) Light passes through pupil • 2) Lens focuses light onto retina • 3) Photoreceptors (rod and cone cells) of the retina create impulses • 4) Impulse travels up optic nerve to brain #2 #1

  8. The shape of the cornea can change where the light gets focused… that’s what causes near or far sightedness

  9. Read the color of the text Read the color of the text

  10. Cow Eye Dissection

  11. Nose Scent chemicals dissolve in mucus Impulse travels from olfactory nerve to brain Tongue Chemicals dissolve in saliva Chemoreceptors in taste buds creates impulse Sense: Smell & Taste

  12. Sense: Touch (Temperature, Pain, Pressure) • Mechanoreceptors in skin sense pressure • Upper layer: gentle touches • Lower layer: heavy pressure • Thermoreceptors & Pain receptors detect temps and chemicals released by damaged cells • Impulses sent to brain

  13. REview • Name the 5 senses. • Label the diagram of the eye. • Which eye part: • Protects the outer eye? • Contains rod and cone cells? • Focuses light? • Name the three bones behind the ear drum? • Name the bone of the ear that has hair cells. • Which sense is: • related to the optic nerve? • related to the olfactory nerve? • related to the auditory nerve? • Which receptors detect temperature changes?

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