PCC BI 232 - Olfaction & Taste Vision Hearing & Equilibrium (41 pages)

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Olfaction & Taste Vision Hearing & Equilibrium



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Olfaction & Taste Vision Hearing & Equilibrium

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Lecture Notes


Pages:
41
School:
Portland Community College
Course:
Bi 232 - Human Anatomy & Physiology II

Unformatted text preview:

Lab Activities 16 17 18 Olfaction Taste Vision Hearing Equilibrium Portland Community College BI 232 Lingual Papilla Papilla are epithelial projections on the superior surface of the tongue Circumvallate papilla contain about 100 taste buds Fungiform papilla contain about 5 taste buds Filiform papillae provide friction that helps the tongue move objects around in the mouth but do not contain taste buds 2 3 Taste Receptors Taste buds contain spindle shaped cells Basal cells produce daughter cells that mature in stages Gustatory cells extend microvilli into the surrounding fluids through a taste pore Contain the taste receptors 4 Taste Bud Histology 5 Gustatory Discrimination 1 2 3 4 5 Umami Beef Salty Sweet Bitter Sour Substances must be dissolved saliva for the chemically gated ion channels to open Olfaction is very important in taste 6 Lab Activity 17 Vision 8 9 Ciliary body 1 2 A Ciliary processes Ciliary epithelium Secretes aqueous humor Ciliary muscle P 3 intrinsic eye muscle Suspensory ligament of the lens A anterior chamber P posterior chamber 1 3 2 10 11 Extrinsic Eye Muscles Superior oblique primarily rotates the top of the eye toward the nose and secondarily moves the eye downward Trochlea Ligament sling Superior rectus primarily moves the eye upward and secondarily rotates the top of the eye toward the nose Lateral rectus moves the eye away from the nose 12 Extrinsic Eye Muscles Medial rectus moves the eye toward the nose Inferior oblique primarily rotates the top of the eye away from the nose and secondarily moves the eye upward Inferior rectus primarily moves the eye downward and secondarily rotates the top of the eye away from the nose 13 Ear Nose 14 Extrinsic Eye Muscles 15 Intrinsic Eye Muscles of the Iris Pupils constrict Parasympathetic Close vision and bright light Pupils dilate Sympathetic Distant vision and dim light 16 Histology of the Retina 17 Refraction Light is bent when it passes from one medium to another medium with a different density



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