abubusenses.three.three Flashcards
When you have a cold, the mucus secretions in your respiratory tract increase and are usually thicker than normal. How would this affect your sense of smell?
-The increased amount of mucus reduces the number of odorants that can reach and bind to olfactory receptor cells.
Jennifer is a 45-year-old mother of two. She was walking across campus one day when she heard someone call her name, but she wasn’t quite sure from where the voice was coming from. She slowly turned in a circle and realized her colleague was standing right behind her. What is a likely explanation of Jennifer’s inability to localize the sound?
-Jennifer is experiencing loss of hearing, but not evenly in both ears, making it difficult to determine the direction of sound.
Another name for pain receptors is
-Nociceptors
Reflective power is how much a lens will bend light.
-False
Negative diopters are convex lenses that bend light more to correct hyperopia (farsightedness).
-False
Acuity is the sharpness of the visual image and is often tested in clinics with the Snellen eye test.
True
People with protanopia have no green-sensitive cones.
False
People with protanopia have no red-sensitive cones.
True
Positive diopters are concave lenses that bend light less to correct myopia (nearsightedness).
False
Myopia is a refractive error, which means that the eye does not bend or refract light properly to a single focus to see images clearly.
-False
The blind spot is actually the optic disc, a point where there are no photoreceptors in the retina.
True
Myopia is the term used to describe a person’s vision when absolutely no refractive error or de-focus exists.
False
Astigmatism causes blurred or distorted vision along a direction.
-True
Place the following structures in order as sound travels into the ear.
- Auricle
- External Acoustic Meatus/Canal
- Tympanic Membrane
- Malleus
- Incus
- Stapes
- Cochlea
Astigmatism is a result from a defect in the.
-Curvature of the cornea or lens.
The blind spot is located at the _________ of the eye.
-Optic Disc
This structure of the eye is flexible and its width determines the amount of light entering the eyeball and degree of sharp depth perception.
-Iris
Visual acuity is measured using a.
-Snellen Eye Chart
The near point of accommodation.
-Increases With Age
People with a decreased sensitivity to green light are said to have this type of color blindness.
-Deuteranopia
Nearsightedness is also called myopia.
-True
The blind spot is located in the __________ visual field of each eye.
-Latera
The pupil is expected to dilate when.
-There is low light intensity
The pupil is expected to constrict when.
-There Is high light intensity
The space between the cornea and the lens is filled with.
-Aqueous Humor
To view close objects, the ciliary muscle will _____, the suspensory ligament will _____, and the lens will become more _______. contract;
-Loosen; Rounded
What is the function of rod cells?
-They are photoreceptor cells that detect the amount of light but not colors.
A person with a decreased sensitivity to red light are said to have this type of color blindness.
-Protanopia
Astigmatism is assessed using a.
-Astigmatism Chart
The optic nerve (CN II) carries the special sense of.
-Vision
A person with longer eyeballs is said to have myopia (or nearsightedness). This means images held further away from the eye appear blurry because the point of the eye’s focus is __________ the retina.
-In Front Of
The __________ occurs in response to a sudden increase in light intensity.
-Pupillary Reflex
Which of the following is not an accessory structure of the eye?
-Retina
An X-shaped junction of fibers at the bases of the optic nerves.
Optic Chiasma
