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layer of receptor cells (rods and cones) that line back of the eye; changes light to impulses
What are rods and cones?
receptor cells in the retina that send impulses to cerebrum which turns image right-side up.
Which receptor cells work best in dim light?
Rod cells - they enable you to see black, white, and shades of gray.
controls amount of light entering into the eye - is as individual as a finger print and even more detailed.
What is the function of ears
sense organs that respond to stimulus of sound; ears convert sound to nerve impulses that your brain interprets
What is the function of the eardrum
separates the outer ear from the middle ear; it's a membrane that vibrates when sound strikes it
What is the function of the hammer, anvil and stirrup
smallest bones in the body that occur in the middle ear; vibration passes from the hammer to the anvil to the strirrup.
What is the function of the cochlea
Occurs in the inner ear; tranfers impulses to the brain through the auditory nerve
How are the senses of smell and taste similar?
Work closely together; both depend upon chemicals in the air and in food. The chemicals trigger responses in receptors in the nose and mouth.
What basic tastes can the tongue distinguish
sweet, salty, sour, bitter, and umami (brothy and meaty flavors)
What is concidered to be a drug?
anything other than food that affects the body, primarily the nervous system.
What do inhalents and hallucinogens do to your body and give examples?
altre perception. LSD, paint thinner
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