your eyes respond to the stimulus of light, the convert the stimulus into nerve impulses that your brain interprets, enabling you to see
100
What are rods?
rods work best in dim light and help you see gray, black and white
cones work best in bright light and help you see bright colors
100
What stimulus do ears respond to?
the stimulus of sound
100
How does your inner ear relate to balance?
When you move your head, the fluid in your ear moves and sends a message to your brain, your brain decides what position your body is in, if the fluid in your ear helps lose balance your brain straightens it out
100
how are taste and smell similar?
both rely on chemicals in the air, chemicals trigger reactions
200
What is the cornea?
a clear, thin tissue that covers the front of the eye
200
How do you see an image?
light strikes rods and cones, nerve impulses travel to cerebrum through optic nerves, cerbrum turns the image the right way, combines images from both eyes into one image
200
how is sound produced?
eardrum vibrates, causing hammer to vibrate, causing anvil to vibrate, causing stirrup to vibrate, causing sound
200
where in the ear are the semicircular canals?
above the cochlea
200
How do smell and taste work together?
taste buds can only taste 5 basic tastes: bitter, sweet, sour, meaty, salty, nose can detect 50 odors, these two combined create more flavors
300
What is the pupil?
the thin opening that allows light to enter the eye
300
What is the retina?
The layer of receptor cells that lines the back of the eye
300
what happens in the inner ear?
membrane channels vibrations into cochlea which is lined with sound receptor cells, fluid in cochlea vibrates, stimulating these receptors sensory neurons send impulse to cerebrum which converts impulse to sound
300
What is the dermis?
layer between skin and epidermis
400
what is the iris?
the structure that surrounds the eye and regulates the amount of light that enters the eye
400
What is nearsightedness?
elongated eyeballs cause you to only see close objects
400
what happens in the middle ear?
eardrum vibrates, hammer vibrates, anvil vibrates, stirrup vibrates, cause sound
400
what does the dermis do?
contains receptors that respond to stimuli, such as pain, temperature, light, textures, picks up feeling of pressure
500
What is the lens?
the flexible structure that focuses the light by bending it, makes the image upside down and reversed
500
what is farsightedness?
shortened eyeballs cause light to not focus on retina, far away objects are blurry
500
what happens in the outer ear?
receives sound vibrations that travel down ear canal to eardrum