Question

There are how many pairs of cranial nerves in a human?
A. 8
B. 12
C. 25
D. 31

Answer 1

Hint:- The cranial nerves are a set of nerves that arise directly from the brain. They relay information and visions from the brain to parts of the body. They are the reason that we have vision, taste, smell, and hearing.

Complete answer:
Your cranial nerves are pairs of nerves that join your brain to different parts of your head, neck, and trunk. Each nerve additionally has a corresponding Roman numeral among I and XII. This is primarily based totally off their region from the front to back. Their capabilities are generally categorized as being both sensory or motor.
There are a set of 12 paired nerves, below are the names and their functions-
- Olfactory nerve- smell
- Optic nerve- vision
- Oculomotor nerve- pupil constriction
- Trochlear nerve- eye movement
- Trigeminal nerve- somatosensory information
- Abducens nerve- eye movement
- Facial nerve- Facial movement
- Vestibulocochlear nerve- Hearing
- Glossopharyngeal nerve- Taste
- Vagus nerve- sensory, motor and autonomic functions of viscera
- Spinal Accessory nerve- muscles used in head movement
- Hypoglossal nerve- control muscles of the tongue
Therefore, the correct answer is (B) 12.

Note:- The olfactory nerve consists of the rootlets of olfactory hair cells withinside the nasal mucosa and isn't always seen at the ventral floor of the brain. The rootlets quit in the olfactory bulb. The olfactory tract includes nerve fibers projecting out of the olfactory bulb to the brain. The cranial nerves are Roman numbered as it was most common during that era.