BIOD 152 Module 3
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BIOD 152 Module 3
- what senses contain specialized receptors via specialized somatic and visceral afferents?
Answer: smell, equilibrium
- the posterior portion of the outer fibrous layer of the eye is called the
Answer: sclera
- what portion of the eye supplies blood supply to the other layers of the eye?
Answer: choroid (of the middle layer)
4. true or false: the more numerous type pf photoreceptors are rods.
Answer: true
- what is the correct order of how light passes through the eye?
Answer: cornea, lens, vitreous fluid, retina
- A patient is found to have blindness of the right visual field of both eyes. what part of the
vision pathway was most likely damaged? explain your response.Answer: Left LGN: All sensory information from the right visual fields travels together after optic chiasm to the left side of the brain.
- A patient is found to have blindness in the right eye. what part of the vision pathway was
most likely damaged? explain your response.Answer: right optic nerve. information from the right visual has not yet crossed the optic chiasm.both peripheral and nasal fields of the right eye would be missing.
- true of false: all sensory information from the optic nerves cross at the optic chiasm.
Answer: false
- what is controlled by the abducens nerve?
Answer: lateral rectus
- your elderly patient is discussing her vision problems. she describes her vision as blurry.
following a visual examination, her left eye deviates medially when looking straight ahead.what is most likely causing the vision problem? explain your reasoning.Answer: abducens nerve controls the lateral rectus. damage to the lateral rectus would cause there to be a muscle imbalance, and the medial rectus would pull the eye medially when looking straight ahead, causing blurry vision. (diplopia)
- Match the numbers (1-5) in the figure below with the correct terms (A-H). Note: not all
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terms will be used.