Download 5 senses cornell notes 5 Senses Cornell Notes

5 Senses Cornell Notes
Questions
Notes:
Hearing. Ears convert sound to nerve impulses that brain interprets
in temporal lobe.
How sound is produced – vibrations move away from source of
sound (in waves). Particles in air vibrate.
Ear in 3 parts:
1. outer – funnel shaped to gather sound waves that travel down
canal.
2. Middle – eardrum vibrates when sound strikes it (like a
drum). Vibrations travel through 3 smallest bones from
hammer to anvil to stirrup.
3. Inner – stirrup vibrates against thin membrane that covers
opening of inner ear. Membrane channels vibration into fluid
in cochlea (lined with receptor cells that move with sound).
When fluid vibrates, it stimulates receptors. Sensory neurons
send nerve impulse to cerebrum through auditory nerve that
are interpreted as sounds.
Balance and inner ear. Semicircular canals – balance. Fluid filled &
hair like extensions. When head moves – fluid in canal moves causing
hairs to bend. Bend produces nerve impulses in sensory neurons.
Impulses travel to CEREBELLUM, which analyzes impulse to
determine way head is moving and position of body. If cerebellum
senses you are losing sense of balance, it sends impulse to muscles to
help regain balance.
Smell and taste. Receptors in nose react to chemicals in air from
food to nose.
When you take a bite – taste buds on tongue respond to chemicals in
food. Nose can distinguish at least 50 basic odors. Only 5 tastes in
tongue (sweet, salty, sour, bitter, and umami). Flavor of food
influenced by both taste and smell.
Smell and taste work closely together. Depends on chemicals in food
and air – trigger response in nose and mouth. Nerve impulses trigger
response in nose and mouth. Nerve impulses travel to brain for
interpretation.
Touch – all areas of skin. Skin contains different kinds of touch
receptors that respond to a # of stimuli.
1. light touch – upper part of dermis
2. heavy pressure – deeper in dermis
3. pain – one of most important feelings (alters body to danger)
4. temperature