BMS100 Past Test Questions

BMS100 Past Test Questions
Chapter 10, Spring 2011
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Which statement about the ossicles is true?
1. the ossicles are three bones located within the inner ear
2. the malleus ("hammer") is directly attached to the stapes ("stirrup")
3. all of the ossicles are directly attached to the inner ear
4. vibrations pass from the eardrum, through the ossicles, and to the inner ear
The oval window is the passage by which vibrations pass from the _?_ to the _?_.
1. outer ear to the middle ear
2. middle ear to the inner ear
3. middle ear to the pharynx (throat)
4. inner ear to the pharynx (throat)
As vibrations pass through the middle ear, the _?_ of the vibrations is increased.
1. frequency (Hz)
2. wavelength
3. pressure
4. all of the above
5. none of the above
The middle ear contains muscles that
1. cause the ear to "pop" when ascending, as in a plane or on a mountain road
2. cause the ear to "pop" when descending, as in a plane or on a mountain road
3. contract to increase the intensity of vibrations passing through the middle ear
4. contract to decrease the intensity of vibrations passing through the middle ear
Which one of the following is normally the greatest?
1. the pressure in the external auditory canal of the outer ear
2. the pressure in the middle ear cavity
3. the pressure in the pharynx (throat)
4. the pressure in the atmosphere
5. none of the above (all of these pressures are normally equal to each other)
Air can normally pass through the
1. oval window
2. round window
3. auditory tube
4. all of the above
What causes your ears to "pop" while ascending in a plane or on a mountain road?
1. movement of eardrum when air passes from pharynx (throat) to middle ear cavity
2. movement of eardrum when air passes from middle ear cavity to pharynx (throat)
3. movement of oval window when air passes from labyrinth of inner ear to middle ear cavity
4. movement of oval window when air passes from middle ear cavity to labyrinth of inner ear
The cochlea is
1. the entire set of all ossicles and the muscles attached to them
2. the tube that passes between the ear and the pharynx
3. the part of the inner ear that resembles a snail shell
4. the part of the inner ear that consists of three loops at different orientations
When vibrations are received by the oval window,
1. they cause fluids and membranes inside the cochlea to vibrate
2. they cause fluids and membranes inside the auditory tube to vibrate
3. they cause receptors in the membrane covering the window to produce action potentials
4. the oval window releases the vibrations to the outer ear to prevent ear damage
The hair cells of the cochlea
1. are "tucked in" between flexible membranes in the spiral organ
2. are stimulated by being stretched, compressed, or twisted
3. respond to stimulation by creating electrical signals
4. have sensory neurons attached to them
5. all of the above
Which statement is true?
1. The cornea is part of the outer layer of the eyeball.
2. The retina is part of the middle layer of the eyeball.
3. The iris and the ciliary body are parts of the inner layer of the eyeball.
4. The pressure inside the eyeball is normally equal to the pressure outside the eyeball.
A major function of the cornea is to
1. bend light rays toward a point in the back of the eye
2. bend light rays so that they enter the eye parallel to each other
3. constrict when necessary to control the amount of light entering the eye
4. become as "flat" as possible when viewing objects that are close to the face
The iris
1. contains pigments that cause a person to have brown eyes or blue eyes, etc.
2. contains muscles that may contract to control the amount of light entering the eye
3. is anterior to (in front of) the ciliary body and therefore usually blocks the view of the ciliary body
4. all of the above
What causes the pupillary constrictor muscles to contract?
1. exposure of the eye to bright light
2. viewing an object that is close to the face
3. viewing an object that is far away
4. viewing an object in a dark environment
The tissues and the structure of the lens cause the lens to spontaneously take what conformation (shape)?
1. perfectly flat (zero curvature)
2. relatively curved, but not spherical
3. perfectly spherical
Which one of the following has the greatest capacity to cause the curvature of the lens to increase?
1. contraction of the pupillary constrictor muscle
2. contraction of the pupillary dilator muscle
3. contraction of the ciliary muscle
4. none of the above has any capacity to cause the curvature of the lens to increase
The suspensory ligaments hold the _?_ in the right place.
1. cornea
2. iris
3. lens
4. retina
Why is the image provided by cones more sharp and clear than the image provided by rods?
1. there are more cones in the retina than there are rods in the retina
2. there are three types of cones, but there is only one type of rod
3. cones are spread throughout the retina, but rods are limited to the center of the retina
4. each cone has its own individual neuronal pathway to the brain, but rods must share their neuronal pathways
Rods are specialized for
1. color vision
2. viewing objects that are close to the face
3. viewing objects that are far away
4. vision in a relatively dark environment
Whereas _?_ respond strongly to red light, _?_ respond strongly to blue light.
1. red cones / blue cones
2. red cones / blue rods
3. red rods / blue cones
4. red rods / blue rods
Most people do not have
1. red cones
2. yellow cones
3. green cones
4. blue cones
The right eye sends signals to
1. the right frontal lobe only
2. the left frontal lobe only
3. the right occipital lobe only
4. the left occipital lobe only
5. both occipital lobes

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