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Unformatted text preview: -hypothalamus: maintains homeostasis Spinal cord-pathway for sensory impulses upward toward the brain & motor impulses down from the brain.-gray matter: cell bodies-white matter: axons and dendrites-responsible for impulses, no info is processed Eye-eye consists of a lens system and a light sensitive surface-lens system has 2 components: cornea and lens-lens focuses the light from the object to the retina (light sensitive surface) -retina: converts the image into a nerve impulse (transmitted to the brain via optic nerve)-sclera: white covering on the eye (helps maintain the shape of the eyeball)-cornea: acts as a lens to magnify the object-vitreous humor: jelly-like substance filling the main cavity-choroid: absorbs scattered rays-blind spot: where nerve fibers from the retina join the optic nerve-iris: surrounds the opening of the eye-pupil: the opening of the eye.-lens: helps focus the image on the retina-cilliary body: enables the lens to change shape...
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- Spring '08
- light sensitive surface, bio lab quiz