KAAP309 Study Guide - Midterm Guide: Thalamus, Photon, Emmetropia

• School: University of Delaware
• Department: Kinesiology & Appl Physiology
• Course: KAAP309
• Professor: Rose William

Document Summary

70% of body"s sensory receptors are in the eye. Visual processing by half of cerebral cortex. Most of the eye is protected by a cushion of fat and bony orbit. Protect the eye and aid in eye function: eyebrows, eyelids (palpebrae, conjunctiva. Lacrimal gland above lateral end of eye, secretes tears. 1. 1. 1. 3 continuous with dura mater of brain posteriorly. 1. 1. 2. 3 numerous pain receptors contribute to blinking and tearing reflexes. 2. 2 three regions: choroid, ciliary body, and iris. 2. 2. 1. 1 most of the uvea; posterior portion of uvea. 2. 2. 1. 2 supplies blood to all layers of eyeball. 2. 2. 1. 3 brown pigment absorbs light to prevent light scattering, which would cause unclear images. 2. 2. 2. 1 ring of tissue surrounding lens: ciliary muscles (parasympathetic) control lens shape, ciliary zonule (suspensory ligament) holds lens in place. 2. 2. 3. 2 pupil central opening regulates amount of light entering. 3. 1 originates as out pocketing of brain; 2 layers. 3. 1. 2. 2 composed of three main types of neurons.