Number of pairs of cranial nerves is__________?
Correct answer: C. 12
- A. 10
- B. 11
- C. 12
- D. 13
Explanation
Humans have 12 pairs of cranial nerves, arising from the brain and mainly serving the head and neck. Students may choose 10 pairs because some older simplified lists or confusion with spinal nerve groups lead to an undercount.
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Neurons receive and transmit information through dendrites, the cell body and axons. The topic explains resting potential, depolarization, repolarization, refractory periods and saltatory conduction, followed by synaptic transmission through neurotransmitters. An action potential is distinct from the graded potential produced at a receptor.
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