Transcript Review the Senses and the Nervous system

Review the Senses and the
Nervous system
• 1. Name the various sensory receptors of the
body.
– Retina
– Olfactory epithelium (olfactory bulb)
– Dermis
– Cochlea
– Taste buds
• 2. Associate each sensory receptor with its sense
Retina
Olfactory bulb
Cochlea
Taste buds
Dermis
Sight
Smell
Hearing
Taste
Touch
The sense of sight
Aqueous humor
Vitreous humor
Iris
Pupil
Cornea
Blind spot
Optic nerve
Lens
Sclera (white outer layer)
Retina (with rods and cones-color)
Choroid layer (blood vessels)
• 3. Place the cards in front of you in the correct
order to identify the pathway light travels to
reach the retina.
– Cornea – Aqueous Humor – Pupil – Lens –
Vitreous Humor – Retina
The sense of sight : Pathway of light
Far sighted or Hyperopia
Far sighted or Hyperopia
Corrected with a
convergent lens
Near sighted or myopia
Near sighted or myopia
Corrected with a
divergent lens
The sense of hearing
Semicircular canals
Auditory Nerve
Ossicles
Pinna
Cochlea
Ear Drum
Auditory Canal
• 4. Place the cards in front of you in the correct
order to identify the pathway sound travels to
reach the cochlea.
– Pinna – auditory canal – ear drum – ossicles cochlea
Sound waves
• Mechanical waves (needs a medium)
• Speed changes with the medium
• Frequency = pitch measured in Hz
• Intensity = loudness measured in dB
Nervous system
• 5. Place the cards in front of you in the correct
order to identify the pathway a nervous
impulse will travel from each of the following
senses
– Sight
Retina – optic nerve – central nervous
system (cerebrum)
– Hearing Cochlea– auditory nerve – central
nervous system (cerebrum)
– Smell Olfactory Bulb – olfactory nerve – central
nervous system (cerebrum)
The nervous system: Neurons
Types of motion
• Voluntary movement
– Motions you think about doing
• Involuntary movement
– Motion you do not have to think about doing (heart
beat, breathing etc…)
• Reflex
– Motion that happens automatically after a stimulus
Types of motion
•
•
•
•
•
Reading
Voluntary
Giving a high five Voluntary
Removing hand from a hot stove
Reflex
Heartbeat
Involuntary
Pushing food through the esophagus Involuntary
Allowing for motion
• 6. Place the cards in front of you in the correct
order to identify the pathway a nervous
impulse will travel if you wish to run away
from a human-eating dragon.
– Stimulus – sensory receptor – sensory nerve –
central nervous system (cerebrum) – Motor nerve
- muscle