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AIIMS 2001
Exam
AIIMS
Year
2001
Subject
Zoology
Chapter
Neural Control and Coordination

AIIMS 2001 · Zoology · Neural Control and Coordination

Identify the correct statement.

Identify the correct statement.

Options

  1. AIn amniotes last nerve is spinal accessory.
  2. BIn non-amniotes last nerve is vagus.
  3. COptic is shortest nerve.
  4. DOlfactory nerves has mixed fibres.

Correct answer

B. In non-amniotes last nerve is vagus.

Step-by-step solution

10 pairs of cranial nerves are present in anamniotes (fishes and amphibians) and 12 pairs occur in amniotes (reptiles, birds and mammals). In anamniotes the cranial nerves are - Olfactory, Optic, Occulomotor, Trochlear, Trigeminal, Abducens, Facial, Auditory, Glossopharyngeal and Vagus. In amniotes two more cranial nerves, Spinal accessory and Hypoglossal nerves are present in addition to the above ten.
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