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BHU PMT BHU PMT (Screening) Solved Paper-2006

  • question_answer
    5th cranial nerve of frog is called :

    A)  optic nerve                       

    B)  vagus

    C)  trigeminal                          

    D)  ophthalmic

    Correct Answer: C

    Solution :

                     In anamniote (Fishes and amphibians), a total of 10 pairs of cranial nerves are present, while it is 12 pair in amniote (reptiles, birds, mammals). The first 10 pairs are common for frog and rabbit. First 5 pair can be tabulated as :
    Cranial nerve Number Functional Class Distribution
    Olfalctory \[\text{I}\] Sensory Nose
    Optic \[\text{II}\] Sensory Retina of  eye
    Oculomotor \[\text{III}\] Motor 4 eye ball (extra ocular muscles)
    Trigeminal \[\text{IV}\] Motor Superior oblique muscle
    Trigeminal \[\text{V}\] Mixed
    (i) Ophthalmic Snout
    (ii) Maxillary Upper jaw
    (iii) Mandibular Lower jaw


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