[PHYSIO] CNS (2024)

Question 1

1. Which of the following tactile receptors are slow-adapting receptors responding to pressure and texture?
   (1 Point)
   Select your answer:
   a) Pacinian Corpuscles
   b) Merkel’s disc
   c) Meissner’s corpuscles
   d) Free nerve endings

Answer 1

b) Merkel’s disc

Question 2

2. Which structure, when cut, can cause homonymous hemianopsia?
   (1 Point)
   Select your answer:
   a) Optic Nerve
   b) Optic Tract
   c) Optic Chiasm
   d) Geniculocalcarine tract

Answer 2

b) Optic Tract

Question 3

3. What results from cutting the optic chiasm?
   (1 Point)
   Select your answer:
   a) Blindness in the ipsilateral eye
   b) Blindness in the contralateral eye
   c) Bitemporal hemianopsia
   d) Presbyopia in both eyes

Answer 3

c) Bitemporal hemianopsia

Question 4

4. A 34-year-old man was diagnosed with blindness of the right half of both eyes. Which optic pathway was probably transected?
   (1 Point)
   Select your answer:
   a) Right Optic nerve
   b) Left Geniculocalcarine tract
   c) Left Optic nerve
   d) Right Geniculocalcarine tract

Answer 4

b) Left Geniculocalcarine tract

Question 5

5. Which of the following is not paired correctly?
   (1 Point)
   Select your answer:
   a) Fast axonal transport: 100mm/day
   b) Molecular motors: dynein and kinesin
   c) Synaptic transmission: orthodromic conduction
   d) Nerve growth factor: retrograde transport

Answer 5

a) Fast axonal transport: 100mm/day

Question 6

6. During a physical exam, you asked a patient to smell ground coffee. What cranial nerve function are you testing?
   (1 Point)
   Select your answer:
   a) Facial nerve
   b) Trigeminal nerve
   c) Vagus nerve
   d) Glossopharyngeal nerve
   e) Olfactory nerve

Answer 6

e) Olfactory nerve

Question 7

7. The retinal area that does not respond to light is?
   (1 Point)
   Select your answer:
   a) Optic disc
   b) Macula
   c) Retina
   d) Fovea

Answer 7

a) Optic disc

Question 8

8. Two-point discrimination is a function of?
   (1 Point)
   Select your answer:
   a) Hair-end organ
   b) Ruffini’s end organ
   c) Meissner’s corpuscle
   d) Merkel’s disc
   e) Pacinian corpuscle

Answer 8

c) Meissner’s corpuscle

Question 9

9. When light strikes the photoreceptors, it causes what?
   (1 Point)
   Select your answer:
   a) Afterpolarization
   b) Repolarization
   c) Hyperpolarization
   d) Depolarization

Answer 9

c) Hyperpolarization

Question 10

10. Corrective lenses for near-sighted persons consist of ________ lenses because these lenses ________ light rays so that these are focused on the retina.
    (1 Point)
    Select your answer:
    a) Convex, converge
    b) Convex, diverge
    c) Concave, converge
    d) Cylindrical lenses, converge
    e) Concave, diverge

Answer 10

e) Concave, diverge