Which cranial nerve has the highest number of branches?
Correct answer: A. Vagus nerve
- A. Vagus nerve
- B. Trigeminal nerve
- C. Facial nerve
- D. None of these
Explanation
The trigeminal nerve is the largest 5th cranial nerve. It has 3 branches - (i) Ophthalmic, a sensory branch from the skin of the nose, eyelids, forehead and scalp, and from the conjunctiva and lacrimal glands (ii) Maxillary, also a sensory branch from the skin and mucous membrane of cheeks and upper lip, and from lower eyelids (iii) Mandibular, a mixed branch innervating the lower jaw, lower lip, pinna and tongue. The Vagus nerve is the 10th cranial nerve and innervates the larynx, trachea, oesophagus, stomach, lungs, heart and intestines. The facial nerve is the 7th cranial nerve and innervates the muscles of the face and back, taste buds and salivary glands.
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Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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