BMS100 Past Test Questions

BMS100 Past Test Questions
Chapter 10, Spring 2009
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Which one of the following is true?
1. The eye consists of three major layers.
2. Normal vision requires that the pressure inside the eye be kept equal to atmospheric pressure.
3. Both of the above.
4. None of the above.
Of the structures on the following list, the one most directly involved in refraction of light is the
1. iris
2. sclera
3. cornea
4. central fovea
The "pupillary constrictor" and the "pupillary dilator" are parts of the
1. iris
2. cornea
3. sclera
4. retina
Which one of the following is false?
1. The suspensory ligaments control the position and the shape of the lens.
2. The ciliary muscle controls the tension in the suspensory ligaments.
3. For near vision, the lens must assume a high degree of curvature (become "fat and round").
4. When a person is viewing distant objects, the suspensory ligaments are loose (have a low degree of tension).
Visual acuity ("sharp vision") is provided by _?_ and is based on the fact that
1. rods / there are many rods per sensory neuron
2. rods / there is only rod per sensory neuron
3. cones / there are many cones per sensory neuron
4. cones / there is only one cone per sensory neuron
The visual information coming from the right eye is received by
1. the frontal lobe of the left cerebral hemisphere
2. the occipital lobe of the right cerebral hemisphere
3. the occipital lobe of the left cerebral hemisphere
4. the occipital lobes of both cerebral hemispheres
Photoreceptors (dendrites that produce electrical signals when stimulated by light) are most abundant in the
1. iris
2. ciliary body
3. retina
4. optic nerve
Long wavelength (red), medium wavelength (green), and short wavelength (blue) are terms that refer to
1. relative sensitivities of different types of rods
2. relative sensitivities of different types of cones
3. the fact that each cone is equally sensitive to all different wavelengths ("colors") of light
4. different regions of the retina that allow us to see different wavelengths ("colors") of light
Which one of the following is the smallest?
1. the tympanic membrane ("eardrum")
2. incus ("anvil")
3. stapes ("stirrup")
4. malleus ("hammer")
The auditory ossicles ("ear bones")
1. cause vibrations of fluid in the middle ear when they vibrate
2. cause vibrations of fluid in the inner ear when they vibrate
3. increase the pressure (intensity) of vibrations caused by soft sounds
4. both A. and C.
5. both B. and C.
which statement best describes the function of the stapedius and tensor tympani muscles of the middle ear?
1. They contract to increase the "intensity" of soft sounds.
2. They contract to decrease the "intensity" of loud sounds.
3. They contract to push air and equalize pressures between the middle ear and the atmosphere (make ears "pop").
4. They generate electrical signals that are transmitted to hair cells as part of the hearing process.
The auditory (eustachian) tube allows equalization of pressure between the
1. pharynx (throat) and inner ear
2. middle ear cavity and inner ear
3. atmosphere and middle ear cavity
4. atmosphere and inner ear
The "spiral organ" is located within the
1. tympanic membrane
2. auditory tube
3. cochlea
4. semicircular ducts
The receptors involved in hearing are known as
1. ossicles
2. hair cells
3. labyrinths
4. auditory tubes
In the _?_, vibrations are conducted mainly through fluids.
1. middle ear
2. inner ear
3. both of the above
4. none of the above