Exam 2 Version 2 Answer Key

Exam 2 Version 2 Answer Key - Fundamentals of Neurobiology,...

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Version 2 Fundamentals of Neurobiology, Exam 2, March 2008 Name: __________________________________________ 1. Most of the eyes refractive power is accomplished by what structure? A) Cornea B) Fovea C) Retina D) Lens E) Iris 2. Which of the following brain area(s) is/are target(s) of retinal ganglion cell axons? A) Lateral geniculate nucleus (LGN) B) Suprachiasmatic nucleus C) Superior colliculus D) A and B are both correct E) A, B and C are all correct 3. As a result of falling down a staircase the patient suffered a complete transection of the right optic tract. What is the consequence of this lesion? A) Peripheral vision lost in the left visual field B) Vision lost in the right visual fields of both eyes C) Vision lost in the right eye D) Vision lost in the left visual fields of both eyes E) Vision lost in the left eye 4. The photopigment in rods is called __________. It consists of a protein, ___________ , and a small molecule, _________ , that changes its conformation when it absorbs light. A) rhodopsin ; transducin ; retinal B) rhodopsin ; opsin ; retinal C) opsin ; rhodopsin ; phosphodiesterase D) opsin ; transducin ; arrestin E) transducin ; rhodopsin ; retinal 5. Which membrane lies closest to the brain? A) Arachnoid B) Choroid plexus C) Pia mater D) Dura mater E) Meninges
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Version 2 6. When the doctor examined her patient she found that he had lost sensitivity to touch below the chest on the right side of the body, and he had lost sensitivity to pain on the left side of the body below the chest. The doctor concluded that her patient had a lesion of half the spinal cord. Which side of the spinal cord was lesioned, and at what level? A) right side, waist-level B) right side, chest-level C) left side, waist-level D) left side, chest-level 7. Which of the following contributes to the pressure at the oval window being 20 times greater than that at the tympanic membrane? A) Ossicles act like levers B) Area of oval window is larger than tympanic membrane C) Sound travels faster in fluid than in air D) A and B are both correct E) A, B and C are all correct 8. Why does the fovea appear like a pit in the retina? A) Because of a high ratio of photoreceptors to ganglion cells B) Because of the indentation formed when the optic nerve leaves the retina C) Because of the presence of blood vessels that scatter light D) Because of an absence of photoreceptors E) Because of the lateral displacement of the cells layers above the photoreceptors
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This homework help was uploaded on 04/03/2008 for the course CELL BIO & 245 taught by Professor Schjott during the Spring '08 term at Rutgers.

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Exam 2 Version 2 Answer Key - Fundamentals of Neurobiology,...

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