Transcript Senses

Senses
Vision
Retina: Contains receptor cells that
respond to light.
 Receptors ---- photoreceptors

 Rods
--- Functions with very little light;
can’t detect color (night vision).
 Cones --- Distinguishes color; requires
bright light.
Hearing & Balance
Cochlea --- the organ of the inner ear that
contains the mechanoreceptors for
hearing.
 Sound waves enter outer ear, travels to
eardrum and vibrates membrane, the
vibrations enter middle ear, vibrations
cause cochlea fluid to move like a wave,
hairs move and cause impulses, impulses
are interpreted as sound.

Taste & Smell

Both rely on chemo receptors --- respond
to specific kinds of chemicals & sends
impulses to brain through sensory nerves.

4 primary tastes --- bitter, salty, sour, and
sweet.