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30 Cards in this Set

  • Front
  • Back

Tarsal glands

Accessory glands that produce an oily secretion

Sclera

The portion of the fibrous layer of the eye that is white and opaque

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

Activation of what nervous system causes contraction of the dilator pupillae muscles?

Sympathetic nervous system

Damage to the medial rectus muscles would probably affect convergence

True

The phenomenon of dark adaption is best explained by the fact that rods exposed to intense light need time to generate rhodopsin

True

Blockage of the scleral venous sinus might result in what?

Glaucoma

Of the neurons in the retina the axons of which of these form the optic nerve?

Ganglion cells

Nearsightedness is more properly called what?

Myopia

Which reactions occur when a person looks at a distant object?

Pupils dilate, ciliary zonule becomes taught, lenses become less convex

The blind spot of the eye is where the optic nerve leaves the eye

Also known as optic disc

Olfactory tract damage would probably affect what sense?

Smell

Sensory impulses transmitted over the facial, glossopharyngeal, and vagus nerves are involved in what sensation?

Taste

Where are taste buds found?

1. Anterior part of the tongue


2. Posterior part of the tongue.


3. Palate

How are gustatory epithelial cells stimulated?

By Substances in solution

Mitral cells

Cells in the olfactory bulb that act as local integrators of olfactory inputs

Where are olfactory nerve filaments found?

Passing through the cribriform plate of the ethmoid bone

How does conduction of sound from the middle ear to the internal ear occur?

Via vibration of the stapes in the oval window

How does the transmission of sound vibrations through the internal ear occur?

Chiefly through fluid

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

Pitch is to frequency of sound as loudness is to what?

Intensity

What is the structure that allows pressure in the middle ear to be equalized with atmospheric pressure

Pharyngotympanic tube

What is important in maintaining the balance of the body?

1. Visual cues


2. Semicircular canals


3. The saccule


4. Proprioceptors

Equilibrium receptors that report the position of the head in space relative to the pull of gravity are what?

Maculae

What are possible causes of conduction deafness?

1. Impacted cerumen


2. Middle ear infection


3. Otosclerosis

What are the intrinsic eye muscles?

Smooth muscles of the iris and ciliary body

Otoliths or ear stones are important in equilibrium

True

Rod's respond to low intensity light and provide night and peripheral vision

True

Cones are bright light, High discrimination receptors that provide color vision

True

Anything that must be viewed precisely is focused on the cone rich fovea centralis

True