eye and ear Flashcards
Which of following cells send sight signals? • amakrine • bipolar • cones • ganglion cells • horizontal cells • Muller cells • rods
bipolar, cones, rods, ganglion cells
other Q asks ‘transmits visual signals’ and its the same answers
Which structure forms border between anterior and posterior compartment of eye? • corpus ciliare • cornea • iris • lens • ora serrata • vitreous • zonula ..
iris
conjuctiva bulbi • tunica fibrosa • tunica vasculosa • tunica nervosa • none of the above
none
lamina choriocapillaris • tunica fibrosa • tunica vasculosa • tunica nervosa • none of the above
vasculosa
iris • tunica fibrosa • tunica vasculosa • tunica nervosa • none of the above
vasculosa and fibrosa
part of tunica fibrosa • Bowman membrane • descemets membrane • lamina vitrea • none of the above
both mmbs (they’re part of cornea)
anterior epithelium of cornea • Bowman membrane • descemets membrane • lamina vitrea • none of the above
none. (simple sq epi)
contain iodopsin
• rods
• cones
• none of the above
cones
responsible for vision in dim light (night vision)
• rods
• cones
• none of the above
rods
responsible for sharp vision
• rods
• cones
• none of the above
cones
contain modified cilia
• rods
• cones
• none of the above
both
Which of the following produces the aqueous humor of the eye? • Cells of the ciliary portion of the non-photosensitive retina • Choriocapillary layer • Corneal endothelium • Endolymphatic sac • Schlemm’s canal • Stria vascularis • Substantia propria
+——
Following statements concerning ciliary body are true except:
• Covered with non-photosensitive portion of retina
• Non-photosensitive portion of retina contains cones
• Composed of dense connective tissue
• Contains ciliary muscle
- ++-
true: contains cilliary muscle and covered with non-photo sensitive retina
Which of the following is true of the fovea centralis of the retina?
• Is also known as the blind spot
• Is the region in which the axons of ganglion cells converge and leave the eye as the optic nerve
• Is the region in which retinal veins converge before leaving the eye
• Is the thinest part of the neural retina
• Does not contain photoreceptive cells
• Contain numerous cones
—+-+
Following statements concerning cornea are true except:
• Anterior and posterior epithelia are stratified squamous
• Its stroma is acellular
• Collagen fibrils are contained in its stroma
• Posterior epithelium is simple squamous
• Anterior epithelium rests on Descemet’s membrane
FFVVF
++–+
(faux/wrong F - vrai V/true)
Which of the following cells span the entire width of the neural retina? • Amacrine cells • Bipolar cells • Cone cells • Ganglion cells • Horizontal cells • Muller cells • Rod cells
muller cells (they are glial cells)
Which of the following structures is the most anterior extension of the eye’s tunica vasculosa? • Anterior epithelium • Bruch’s membrane • Ciliary body • Cornes • Iris • Lens • Pigmented epithelium
iris
Which of the following is true of the pigmented epithelium of the retina?
• Rests on Descemet’s membrane
• Contributes anteriorly to the lens
• Derives from the outer wall of the embryonic optic cup
• Phagocytoses portions of cytoplasm (shed) by photoreceptors
• Is classified as a photoreceptor
–++-
Which of the following is true of tears? • Are secreted by meibomiam glands • Contain lysozyme • Are secreted by the glands of Moll • Are secreted by the glands of Zeiss • Enter the eye through the lacrimal puncta • Are secreted by the conjunctiva
contain lysozyme
Lacks an outer segment
• Rod cells
• Cone cells
• Neither
niether
wtf is this Q
Contain narrow portion of cytoplasm rich in neurofilaments
• Rod cells
• Cone cells
• Neither
both do
Most abundant in retina
• Rod cells
• Cone cells
• Neither
rods
Contains rhodopsin
• Rod cells
• Cone cells
• Neither
rods
Layer of choroid • Bowman's membrane • Descemet's membrane • Lamina vitrea • None of the above
lamina vitrea (tiiny part of it)
Contains elastic fibers • Bowman's membrane • Descemet's membrane • Lamina vitrea • None of the above
lamina vitrea
lens • Tunica fibrosa • Tunica vasculosa • Tunica nervosa • None of the above
none
…neither is vitrous body
Ciliary body • Tunica fibrosa • Tunica vasculosa • Tunica nervosa • None of the above
vasculosa
AND NERVOSA
True concerning taste buds • over much of tongue surface • ... • abundant on circumvallate papillae • ... • equipped with microvilli
all correct
Which of the following statements concerning taste receptors are true?
• are equipped with cilia
• they phagocytose neuromediators in response to chemical stimuli
• in the vicinity of the basal portions of cells are situated terminal endings of afferent neurons
• using common staining methods they appear light
• basal cells develop from them
• are primary receptor cells
• are secondary receptor cells
–++–+
About propriocepters in ear:
- have Columnar supportive cells between sensory cells
- Glycoproteins later covers macula
- 3 maculae 2 cristae ampularis
- 2 maculae 3 cristae ampularis
++-+
Most cells in contact with retina:
- Amacrine cells
- Bipolar cells
- Cone cells
- Ganglion cells
- Horizontal cells
- Muller cells
- Rod cells
Receptor cells of cristae ampullares are:
Select one or more:
a. chemoreceptors
b. hair cells, they are equipped with stereocilia and one kinocilium
c. mechanoreceptors
d. proprioceptors
- +
Hair cells of organ of Corti: Select one or more: a. hairs of these cells are kinocilia b. are secondary receptor cells c. afferent and efferent nerve endings surround the outer and inner hair cells d. are primary receptor cells
-++-
