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Nervous System
Chapter 9 and 10
Question | Answer |
---|---|
axons | carry nerve impulses away from the cell body |
dendrites | carry impulses-highly branched |
oligodendrites | produces myelin for brain cells |
multiple sclerosis | myelin sheath disorder-between ages 20 and 40 in woman |
tumors | develop from glia cells, not neurons |
2 neuron pathways | most simple pathways |
vital centers are located in: | medulla oblongata |
hypothalamous | ADH hormone, regulates body temperature and water balance |
duramater | outer layer of the meninges |
neurolemma | outer membrane of schwann cell |
lack of dopamine | parkinson's |
parts of brainstem | medulla oblongata, pons, midbrain |
smell (special sense) | chemoreceptor |
3 layers of the eyeball | sclera, retina, choroid |
iris and ciliary body | involuntary muscle forming front part of chorois |
cornea | window of eye |
refractive eye disorders | myopia, hyperopia, astigmatism |
external ear ends.. | at tympanic membrane |
bones in middle ear | malleus, incus, stapes |
cochlea | organ of hearing |
taste | chemoreceptor |
taste buds | gustatory cells |
4 primary tastes | salty, sweet, sour, bitter |
gray matter | no myelin |
sclera | white of eye |
night vision | rods |
day vision | cones |
photoreceptors for eye | rods and cones |
3 types of glia cells | astrocytes, microglia, oligodendrocytes |
astrocytes | star-shaped cells that anchor small blood vessels to neurons |
microglia | small cells that move in inflammed brain tissue carrying onphagocystis |
oligodendrocytes | procedure myelin for the cells in the brain |
male color blindness | comes from the x chromosome from the mother |
why does nose get used to smell | olfactory receptors get easily fatigued |