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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 |