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30 Cards in this Set
- Front
- Back
Tarsal glands |
Accessory glands that produce an oily secretion |
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Sclera |
The portion of the fibrous layer of the eye that is white and opaque |
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What is the sequence of the normal route for the flow of tears from the eyes into the nasal cavity? |
Lacrimal gland to the lacrimal canaliculi to the lacrimal sacs to the nasolacrimal ducts |
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Activation of what nervous system causes contraction of the dilator pupillae muscles? |
Sympathetic nervous system |
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Damage to the medial rectus muscles would probably affect convergence |
True |
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The phenomenon of dark adaption is best explained by the fact that rods exposed to intense light need time to generate rhodopsin |
True |
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Blockage of the scleral venous sinus might result in what? |
Glaucoma |
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Of the neurons in the retina the axons of which of these form the optic nerve? |
Ganglion cells |
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Nearsightedness is more properly called what? |
Myopia |
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Which reactions occur when a person looks at a distant object? |
Pupils dilate, ciliary zonule becomes taught, lenses become less convex |
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The blind spot of the eye is where the optic nerve leaves the eye |
Also known as optic disc |
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Olfactory tract damage would probably affect what sense? |
Smell |
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Sensory impulses transmitted over the facial, glossopharyngeal, and vagus nerves are involved in what sensation? |
Taste |
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Where are taste buds found? |
1. Anterior part of the tongue 2. Posterior part of the tongue. 3. Palate |
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How are gustatory epithelial cells stimulated? |
By Substances in solution |
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Mitral cells |
Cells in the olfactory bulb that act as local integrators of olfactory inputs |
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Where are olfactory nerve filaments found? |
Passing through the cribriform plate of the ethmoid bone |
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How does conduction of sound from the middle ear to the internal ear occur? |
Via vibration of the stapes in the oval window |
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How does the transmission of sound vibrations through the internal ear occur? |
Chiefly through fluid |
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Spiral organ or organ of Corti |
1. Sounds of high frequency stimulate hair cells at the basal end 2. The hairs of the receptor cells are embedded in the tectorial membrane 3. The basilar membrane acts as a resonator |
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Pitch is to frequency of sound as loudness is to what? |
Intensity |
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What is the structure that allows pressure in the middle ear to be equalized with atmospheric pressure |
Pharyngotympanic tube |
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What is important in maintaining the balance of the body? |
1. Visual cues 2. Semicircular canals 3. The saccule 4. Proprioceptors |
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Equilibrium receptors that report the position of the head in space relative to the pull of gravity are what? |
Maculae |
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What are possible causes of conduction deafness? |
1. Impacted cerumen 2. Middle ear infection 3. Otosclerosis |
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What are the intrinsic eye muscles? |
Smooth muscles of the iris and ciliary body |
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Otoliths or ear stones are important in equilibrium |
True |
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Rod's respond to low intensity light and provide night and peripheral vision |
True |
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Cones are bright light, High discrimination receptors that provide color vision |
True |
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Anything that must be viewed precisely is focused on the cone rich fovea centralis |
True |