Histology 223-283

223. Where is white matter?
Outer surface of the cerebrum and cerebellum
Outer surface of the spinal cord
Inner portion of the brain
Both a and b
Both b and c
224. Which of the following forms myelin in the central nervous system?
Astrocytes
Ependymal cells
Oligodendrocytes
Microglia
Schwann cells
225. What is the primary component of myelin?
Amino acids
Protein
Carbohydrate
Lipid
Both b and c
226. What are neurons in the retina?
Unipolar
Pseudounipolar
Bipolar
Multipolar
Both a and b
227. What are the basophilic clusters of ribosomes and rough endoplasmic reticulum seen in neurons called?
Ganglion
Perikaryon
Astrocyte
Nissl
Terminal bouton
228. All of the following are properties of neurons, except:
High metabolic rate
Longevity
Specialized for conduction
High mitotic rate
Limited ability for oxygen deprivation
229. Which type of neuron is also called an internuncial neuron?
Sensory neurons
Motor neurons
Interneurons
Both a and b
All of the above
230. What is white matter?
Meninges
Myelinated nerve fibers
Cell bodies
Nodes of Ranvier
Neurofilaments
231. What is another term for the cell body of a neuron?
Tracts
Islets
Soma
Cortex
Nuclei
232. What is the covering of a nerve fiber?
Neurium
Perineurium
Epineurium
Endoneurium
None of the above
233. Which of the following is the CNS macrophage?
Astrocytes
Ependymal cells
Oligodendrocytes
Microglia
Schwann cells
234. Which of the following is found in the peripheral nervous system?
Astrocytes
Ependymal cells
Oligodendrocytes
Microglia
Schwann cells
235. Where is the ependyma found?
Lining ventricles
Lining spinal canal
Covering the brain
Covering the spinal cord
Both a and b
236. What is Bruch's membrane?
Ciliary body
Optic disc
Fovea centralis
Lamina vitrea
Lamina cribrosa
237. What are neurons in the retina?
Unipolar
Pseudounipolar
Bipolar
Multipolar
Both a and b
238. Which structure is transparent?
Choroid
Ciliary body
Iris
Ora serrata
Cornea
239. Which of the following is the receptor for color?
Rods
Cones
Bipolar cells
Ganglion cells
Horizontal cells
240. What is responsible for adjusting the lens?
Choroid
Ciliary muscle
Iris
Ora serrata
Sclera
241. What is the region called where the optic nerve exits the eye?
Os
Optic chiasm
Lamina cribrosa
Optic disc
Ora serrate
242. Which of the following is a type of neuron?
Rods
Ganglion cells
Cones
Pigmented epithelium
Supporting cells
243. What is the space anterior to the iris?
Anterior chamber
Posterior chamber
Vitreal cavity
Both a and b
All of a, b, and c
244. Which layer forms the majority of the cornea?
Epithelium
Endothelium
Descemet's membrane
Substantia propria
Bowman's membrane
245. What is the region where the optic nerve leaves the eyeball?
Ciliary body
Optic disc
Fovea centralis
Lamina vitrea
Lamina cribrosa
246. What are the receptors for vision?
Rods
Cones
Bipolar cells
Ganglion cells
Both a and b
247. Where is the ciliary muscle located?
Ciliary body
Optic disc
Fovea centralis
Lamina vitrea
Lamina cribrosa
248. What are the openings within the sclera which allow nerve fibers to exit?
Os
Optic chiasm
Lamina cribrosa
Optic disc
Ora serrate
249. Which of the following is NOT part of the retina?
Receptor cells
Neurons
Pigmented epithelium
Ciliary body
Supporting cells
250. What structure adjusts the shape of the lens?
Internal oblique muscle
Orbicularis oculi
Tarsus
Ciliary muscle
Levator muscle
251. What is the inner layer of the choroid?
Ciliary body
Optic disc
Fovea centralis
Lamina vitrea
Lamina cribrosa
252. Where does aqueous humor from anterior chamber collect into?
Canaliculi
Canal of Hering
Canal of Muller
Canal of Descemet
Canal of Schlemm
253. Which layer of the cornea is acellular?
Epithelium
Endothelium
Descemet's membrane
Substantia propria
None of the above
254. Which structure is avascular?
Retina
Cornea
Choroid
Sclera
Uvea
255. Where is the region associated with maximum visual acuity?
Ciliary body
Optic disc
Fovea centralis
Lamina vitreaN
Lamina cribrosa
256. What is the suspensory ligament of the lens?
Zonlular fibers
Purkinje fibers
Elastic fibers
Spiral ligament
Oval ligament
257. How many layers of tissue compose the eyeball?
1
2
3
4
5
258. What type of glands are the glands of Moll?
Endocrine gland
Apocrine sweat gland
Oil gland
Sebaceous glands
Eccrine sweat gland
259. Which structure is part the uvea?
Ora serrata
Pigmented epithelium
Cornea
Sclera
Ciliary body
260. What is the space anterior to the lens?
Anterior chamber
Posterior chamber
Vitreal cavity
Both a and b
All of a, b, and c
261. What is the vascular pigmented structure?
Choroid
Ciliary body
Iris
Ora serrata
Lens
262. What type of epithelium is on the surface of the cornea?
Simple squamous
Stratified squamous
Simple cuboidal
Simple columnar
Transitional epithelium
263. What makes up the bulk of the cornea?
Purkinje fibers
Myofibrils
Elastic fibers
Reticular fibers
Collagen fibers
264. What is the middle layer of the eyeball?
Uvea
Rods
Cones
Bipolar cells
Ganglion cells
265. What is the anterior pigmented portion of the retina called?
Choroid
Ciliary body
Iris
Ora serrata
Sclera
266. Which one of the following is not found in the retina?
Henle's layer
Bipolar cells
Amacrine cells
Rods
Ganglion cells
267. Which structure is part the uvea?
Ora serrata
Pigmented epithelium
Choroid
Cornea
Sclera
268. What is the space posterior to the lens?
Anterior chamber
Posterior chamber
Vitreal cavity
Both a and b
All of a, b, and c
269. Where is the blind spot?
Ciliary body
Optic disc
Fovea centralis
Lamina vitrea
Lamina cribrosa
270. How many layers does the retina have?
1
2
4
5
10
271. Which of the following is NOT a layer of the cornea?
Bowman's membrane
Substantia propria
Descemet's membrane
Lamina vitrea
Endothelium
272. Where on the retina are there no photoreceptors?
Ciliary body
Optic disc
Fovea centralis
Lamina vitrea
Lamina cribrosa
273. What makes up the bulk of the sclera?
Purkinje fibers
Myofibrils
Elastic fibers
Reticular fibers
Collagen fibers
274. Which is NOT part of the retina?
Rods
Cones
Bipolar cells
Ganglion cells
Uvea
275. What is the most anterior portion of the uvea?
Choroid
Ciliary body
Iris
Ora serrata
Sclera
276. Which one of the following is not found in the retina?
Pigment epithelium
Muller's cells
Huxley's layer
Horizontal cells
277. Which structure is part the uvea?
Sclera
Iris
Ora serrata
Pigmented epithelium
Cornea
278. What is the space posterior to the iris?
Anterior chamber
Posterior chamber
Vitreal cavity
Both a and b
All of a, b, and c
279. Which cell type is the receptor cell within the organ of Corti?
Cells of Hensen
Hair cells
Inner border cells
Outer phalangeal cells
Inner pillar cells
280. What is the glomerulus?
Afferent arteriole
Efferent arteriole
Capillary tuft
Peritubular capillaries
Vasa recta
281. What is a renal pyramid and its associated cortex referred to?
Medulla
Lobe
Renal columns
Nephron
Medullary ray
282. Approximately how many nephrons are there in each kidney?
1,000
10,000
100,000
1,000,000
10,000,000
283. What is the Malpighian corpuscle?
Glomerulus
Bowman's capsule
Renal corpuscle
Loop of Henle
Distal convoluted tubule
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