Chapter 17: Special Senses

Question 1

3 kinds of cells in olfactory epithelium

Answer 1

Sensory neurons
Supporting epithelial cells
Basal epithelial cells.

Question 2

Olfactory pathway

Answer 2

Olfactory nerves (1st order)
Olfactory bulbs
Mitral cells (2nd order)
Olfactory tract
Olfactory cortex (temporal)
Orbitofrontal cortex

Question 3

3 types of lingual papillae

Answer 3

Vallate papillae (large, circular)
Fungiform
Foliate (degenerates in childhood)

Question 4

Gustatory pathway

Answer 4

CN7,9,10 (1st order)
Gustatory nucleus
Limbic system
Gustatory cortex

Question 5

Accessory structures of the eye

Answer 5

Eyelids
Eyelashes
Eyebrows
Lacrimal apparatus
Extraocular muscles.

Question 6

Lacrimal apparatus

Answer 6

Lacrimal glands
Lacrimal ducts
Lacrimal puncta
Lacrimal canaliculi
Lacrimal sac
Nasolacrimal duct

Question 7

6 extraocular muscles

Answer 7

Superior rectus
Inferior rectus
Lateral rectus
Medial rectus
Superior oblique
Inferior oblique

Question 8

Fibrous layer of the eye

Answer 8

Cornea (superficial)
Sclera (posterior)
Canal of schlemm

Question 9

Vascular layer of the eye

Answer 9

Choroid
Ciliary body
Iris

Question 10

Choroid

Answer 10

Posterior vascular layer. Contains melanocytes. Becomes ciliary body anteriorly.

Question 11

Ciliary body

Answer 11

Anterior. Extends from ora serrata to junction of sclera and cornea.
Contains ciliary processes, zonular fibres, and ciliary muscle.

Question 12

Iris

Answer 12

Colored portion of eyeball. Consists of melanocytes, circular, and radial smooth muscles.
Regulars amount of light entering eye.

Question 13

Retina (inner layer) of eye

Answer 13

Posterior 3/4 of eye. Contains optic disc, retinal vasculature, neural layer.
Responsible for vision.

Question 14

Visual pathway

Answer 14

Photoreceptor
Bipolar cell
Ganglion cell
Optic nerve
Optic chiasm
Optic tract