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The mucous membrane that lines the eyelids and is reflected over the anterior surface of the eyeball is the conjunctiva.
Researchers have found that retinal ganglionic fields are of two types: on center or off center.
The extrinsic eye muscle motor units contain only 8 to 12 muscle cells and in some cases as
few as 2 or 3 muscle cells.
The structure that allows equalization of the pressure in the middle ear with that outside the body is the external auditory meatus.
In order for sound to reach the spiral organ (of Corti), the auditory ossicles must vibrate the oval window and set the endolymph in motion.
Light passes through the entire thickness of the neural layer of the retina to excite the
Theoretically, an individual born without a middle ear would be able to hear by bone conduction with a hearing aid.
When we move from darkness to bright light, retinal sensitivity is lost, but visual acuity is gained.
cross over to the opposite side at the chiasma
Nerve fibers from the medial aspect of each eye ________.
has no blood supply
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 ________.
There are three layers of neurons in the retina. The axons of which of these neuron layers form the optic nerves?
lateral geniculate body of the thalamus
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 ________.
outer hair cells stiffen the basilar membrane
As sound levels increase in the spiral organ (of Corti), ________.
Complete adaptation occurs in about one to five minutes.
Which of the following is true about gustatory receptors?
Some of the sensation of olfaction is actually one of pain.
Select the correct statement about olfaction.
umami amino acids glutamate and lysine
Which of the following taste sensations is incorrectly matched to the chemicals that produce it?
Vitamin supplements can reverse degenerative changes.
Which statement about malnutrition-induced night blindness is most accurate?
occipital lobe of the cortex
Conscious perception of vision probably reflects activity in the ________.
primary visual cortex
In the visual pathways to the brain, the optic radiations project to the ________.
Visual inputs to the ________ serve to synchronize biorhythms with natural light and dark.
despite the fact that the fetus cannot see, functional visual cortical connections are established
In the uterus ________.
Which of the following could not be seen as one looks into the eye with an ophthalmoscope?
They are unipolar neurons.
Which of the following is not a characteristic of olfactory receptor cells?
When we see the color of an object, all light is being absorbed by that object except for the
color being experienced.
Which of the following is true about light and vision?
Rods absorb light throughout the visual spectrum but confer only gray tone vision.
Which of the following is true about photoreceptors?
Cristae respond to angular acceleration and deceleration.
Select the correct statement about equilibrium.
cornea, aqueous humor, lens, vitreous humor (CALV)
Light passes through the following structures in which order?
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