A&P Chapter 15

25 July 2022
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Information from balance (equilibrium) receptors is processed in __________.
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the brain stem
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Nerve fibers from the medial aspect of each eye ________.
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cross over to the opposite side at the chiasma
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Receptors for hearing are located in the ________.
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cochlea
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Visible light fits between ________.
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UV and infrared
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Which of the following is true about gustatory receptors?
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Complete adaptation occurs in about one to five minutes.
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Information from balance receptors goes directly to the ________.
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brain stem reflex centers
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The receptor membranes of gustatory cells are ________.
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gustatory hairs
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What structure regulates the amount of light passing to the visual receptors of the eye?
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iris
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Which of the following is true about light and vision?
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When we see the color of an object, all light is being absorbed by that object except for the color being experienced.
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Which of the following could not be seen as one looks into the eye with an ophthalmoscope?
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optic chiasma
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The first vestiges of eyes in the embryo are called ________.
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optic vesicles
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Farsightedness is more properly called ________.
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hyperopia
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Which structure is NOT matched with its function?
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iris: allow light into eye
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As sound levels increase in the spiral organ (of Corti), ________.
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outer hair cells stiffen the basilar membrane
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Ear stones.
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Otoliths
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Connects the middle ear with the nasopharynx.
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pharyngotmpanic tube
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Separates external acoustic meatus from the middle ear.
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tympanic membrane
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Contains utricle and saccule.
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vestibule
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Detects linear acceleration.
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vestibule
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Which of the following structures is not part of the external ear?
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pharyngotympanic tube
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Theoretically, an individual born without a middle ear would be able to hear by bone conduction with a hearing aid.
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True
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Ciliary muscles are a type of skeletal muscle.
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False
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The anterior chamber of the eye is filled with vitreous humor.
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False
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Chemically sensitive cilia are found in this structure.
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Olfactory epithelium
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Hair cells receptive to changes in static equilibrium are found in this structure.
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macula
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Hair cells receptive to changes in dynamic equilibrium are found in this structure.
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crista ampullaris
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Chemically sensitive microvilli found in this structure.
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Taste buds
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What structure helps us localize sound?
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the superior olivary nucleus
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The fluid contained within the membranous labyrinth is called perilymph.
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False
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The photoreceptor cells are sensitive to damage from light.
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True
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Which pairing of terms is incorrectly related?
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frequency of sound waves: loudness of the sound
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Which of the following is not a characteristic of olfactory receptor cells?
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They are unipolar neurons.
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What is the main function of the rods in the eye?
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vision in dim light
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Which of the follow types of neurons are replaced throughout adult life?
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olfactory receptor cells
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Another name for the primary visual cortex is ________.
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striate cortex
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Aqueous humor forms during capillary filtration in the __________?
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ciliary body
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How are the olfactory receptors activated?
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Odorants dissolve in the mucus and bind to receptors.
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An essential part of the maculae involved in static equilibrium is (are) the ________.
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otoliths
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Dark adaptation ________.
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involves accumulation of rhodopsin
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In the visual pathways to the brain, the optic radiations project to the ________.
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primary visual cortex
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Which accessory eye structure is NOT correctly matched with its function?
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lacrimal glands: destroy bacteria
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Which of the following is true about photoreceptors?
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Rods absorb light throughout the visual spectrum but confer only gray tone vision.
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Visual processing in the thalamus does not contribute significantly to ________.
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night vision
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Which of the following is NOT a requirement for something to be tasted?
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The tastant must contact the basal epithelial cells of the taste buds.
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The tarsal plate of the eyelid ________.
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is connected to the levator palpebrae
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How many ossicles are found in the ear?
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three
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Loss of hearing resulting from prolonged exposure to high-intensity sounds.
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sensorineural deafness
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Can result from the fusion of the auditory ossicles.
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conduction deafness
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A possible side effect of medications such as aspirin.
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tinnitus
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One of the most common results of otitis media.
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conduction deafness
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Can result from impacted cerumen.
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conduction deafness
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The semicircular canals are adapted to detect static equilibrium.
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true
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Houses the spiral organ (of Corti.)
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Cochlear Duct
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The receptor organ for hearing.
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Spiral Organ of Corti
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The central part of the bony labyrinth.
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vestibule
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A membrane that transmits sound vibrations to the auditory ossicles.
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tympanic membrane
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Ordinarily, it is not possible to transplant tissues from one person to another, yet corneas can be transplanted without tissue rejection. This is because the cornea ________.
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has no blood supply
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The first "way station" in the visual pathway from the eye, after there has been partial crossover of the fibers in the optic chiasma, is the ________.
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lateral geniculate body of the thalamus
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The only special sense not fully functional at birth is the sense of ________.
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vision
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Ceruminous glands are ________.
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modified apocrine sweat glands
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As light hits the retina, the first structure the light encounters is a rod or a cone.
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False
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There are three layers of neurons in the retina. The axons of which of these neuron layers form the optic nerves?
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ganglion cells
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Odorants must be volatile to be smelled.
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True
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As the ciliary muscle relaxes, the suspensory ligaments tighten and stretch the lens, allowing for distance vision.
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True
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Sound is generally perceived in the occipital lobe of the cerebral cortex.
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False
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The receptor for static equilibrium is the ________.
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macula
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Which of the following taste sensations is incorrectly matched to the chemicals that produce it?
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umami-triglycerides and fatty acids
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The mucous membrane that lines the eyelids and is reflected over the anterior surface of the eyeball is the conjunctiva.
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True
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The cells of the retina in which action potentials are generated are the ________.
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ganglion cells
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The sensory layer of the eye.
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Retina
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The structure most responsible for focusing light rays that enter the eye.
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Lens
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Helps maintain the intraocular pressure; located in the anterior part of the eye
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Aqueous humor
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Area of greatest visual acuity.
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Fovea Centralis
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The bending of light rays is called reflection.
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False
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The eye muscle that elevates and turns the eye laterally is the ________.
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inferior oblique
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Conscious perception of vision probably reflects activity in the ________.
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occipital lobe of the cortex
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Light passes through the following structures in which order?
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cornea, aqueous humor, lens, vitreous humor
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Select the correct statement about equilibrium.
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Cristae respond to angular acceleration and deceleration.
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Which of the following is true of receptors for dynamic equilibrium?
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The receptors for dynamic equilibrium respond to rotational forces.
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Select the correct statement about olfaction.
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Some of the sensation of olfaction is actually one of pain.
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A condition that can result from a deficiency of vitamin A.
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night blindness
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A condition of deafness that may result from otosclerosis.
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conduction deafness
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An inflammation of the lining of the middle ear.
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otitis
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A condition often leading to blindness due to increased intraocular pressure.
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glaucoma
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Choose the correctly paired terms.
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nyctalopia: night blindness
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The blind spot of the eye is where ________.
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the optic nerve leaves the eye