nervous!
Help!
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| difference between a pupil of an eye in a movie theatre and an eye outside during a sunny day. | movie theatre pupil, big to let more light in, ouside pupil, small to let less light in.
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| what is the function of the nervous system? | to control how the body functions internally and how it reacts to the environment-receives stimuli and responds.
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| What are the 3 parts of the brain responsible for? | Cerebrum: senses(vision, hearing, smell etc.), thinking decision making, planning etc.
cerebellum: coordinates muscle movement.
medulla: reflex actions(choking, coughing etc.), basic body functions(heart rate, bp, co2 levels etc.)
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| what are the parts of the ear? | outer ear, ear canal, eardrum, middle ear, 3tiny bones, cochlea, semicircular canal, eustachian tube, auditory nerve, inner ear
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| what are the functions of the parts of the ear(outer ear to middle ear)? | outer ear-funnel sound into ear canal
ear canal-tube from outer ear to middle ear(delivers air)
eardrum-seperates middle ear+outer ear +transfers soundwaves to first tiny bone
3 tiny bones-vibrate from sound waves
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| what are the functions of the parts of the ear(inner ear) | cochlea- receptor cells influid change sound waves to nerve message
semicirc canals- nerve messages in fluid control balance
auditory nerve- takes nerve message to hearing center from cochlea
eust tube-changes pressure on sides of eardrum to keep it eq
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| What stimulus is the ear designed to receive? | designed to receive sound stimuli.
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| What are some parts of the ear that can be damages leading to hearing loss? | eardrum- break or perferate
auditory nerve- brain cant receive messages from cochlea.
cochlea-damage to receptor cells=no messages
ear canal-filled with wax= sound not funneled properly
auditory part of brain-can't interpret messages correctly
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| what are the parts of the eye? | cornea, iris, pupil, lens, muscle tissue, fluid, retina, optic nerve, receptor cells(retina), tapetum-animals only
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| what are the functions of the eye parts? | cornea-protect eye
iris-contracts to change pupil size/control amount of entering light
pupil-opening that allows light to enter
retina- contains receptor cells that change light image into nerve message
optic nerve- carries message to vision part o/b
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| What are some things that could go wrong with the eye that ends in vision damage? | optic nerve- cant carry message
vision center-cant interprtet message
retina/receptor cells-cant make message
iris/pupil-cant allow proper amount of light in
lens-can't focus correctly
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| What decibels are safe and what are not in general? | anything under 80-safe, anything over 80-not safe but amount of time before damge starts depends on time.
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| What are some effects of noise pollution on the body? | high bp, anxiety, muscle stress, increased heartrate, nervousness, stomachaches and ulcers
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| What kind of stimulus is the eye designed to receive | designed to receive light stimuli
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| why does the brain need oxygen and nutrients even when you are sleeping? | needs to be constantly functioning
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| How does the nervous system interact with other systems?(musc. resp. circ.) | musc.- sends messages about when to contract or relax.
resp.-medulla reads co2 levels and sends messages to diaphragm to contract
circ.- o2+ glucose go to whole nervous system
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| How can you improve your ability to remember something? | use as many senses as possible. More senses used, the stronger the memory. More connections with other nerves are made=more possible pathways.
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| What inference can we make based on the fat that the medulla is a similar size in all vertebrates? | no matter what the vertebrates thinking capacity, it still needs the same amouunt of brain tissue devoted to basic body functions.
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| list the parts used to hear in order. | outer ear, ear canal, eardrum, middle ear-3tiny bones, cochlea/receptor cells, auditory nerve, auditory center of brain.
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| How are the circulatory systems and nervous systems alike and different? | sim-many branches found everywhere, workhorse
dif. workhorse-heart vs brain, hollow vs not, blood vs nerve message
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| What does a nerve cell look like? How does this make it good for carrying nerve messages? | long and skinny with projections--->easier+more efficient for messages to travel long distances. many projections can continue to synapse with many other projections creating billions of pathways all over the body for nerve messages to travel.
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| What is the difference between a nerve and a nerve cell? | nerves are made of nerve cells.
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| What happens to create a reflex? list some examples of reflexes. | stimulus-receptor cells in receptor organ-cells create nerve message from stimulus travel up a nerve to spinal cord- spinal cord sends a dif. mssg to some musc. to contract. choke, puke, hot pan/burn, blink
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