All Free General Anatomy MCQs with Answers
Every General Anatomy question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.
452 questions · page 5 of 23
- A. Posterior ethmoidal nerve
- B. Posterior superior alveolar nerve
- C. Sphenoidal nerve
- D. Infratemporal nerve
Explanation: The posterior ethmoidal nerve, a branch of the ophthalmic division of the trigeminal nerve, supplies the sphenoidal air sinus.
Correct answer: Posterior ethmoidal nerve- A. Nasopalatine nerve
- B. Posterior ethmoidal nerve
- C. Pterygopalatine ganglion
- D. Nasociliary nerve
Explanation: The posterior ethmoidal nerve mainly supplies the posterior ethmoid air cells and sphenoidal sinus, not the nasal septum.
Correct answer: Posterior ethmoidal nerve- A. Ovale
- B. Rotundum
- C. Stylomastoid
- D. Inferior orbital fissure
Explanation: The maxillary nerve is the second division of the trigeminal nerve and leaves the middle cranial fossa through the foramen rotundum.
Correct answer: Rotundum- A. Lingual, facial and palatine nerve
- B. Lingual and inferior alveolar nerves
- C. Inferior alveolar and cervical nerves
- D. All of the above
Explanation: The lingual and inferior alveolar nerves are major branches of the mandibular division of the trigeminal nerve.
Correct answer: Lingual and inferior alveolar nerves- A. Masseter
- B. Buccinator
- C. Medial pterygoid
- D. Anterior belly of digastric
Explanation: Buccinator is a muscle of facial expression supplied by the facial nerve, despite its location in the cheek.
Correct answer: Buccinator- A. Ala of the nosa and lower eyelid
- B. The upper cheeks
- C. Gingiva of the maxilla
- D. Temporomandibular joint
Explanation: The maxillary nerve supplies the midface, including the ala of the nose, lower eyelid, upper cheek, and maxillary gingiva.
Correct answer: Temporomandibular joint- A. Foramen ovale
- B. Foramen rotundum
- C. Superior orbital fissure
- D. Stylomastoid foramen
Explanation: The trigeminal divisions pass through the foramen ovale, foramen rotundum, and superior orbital fissure.
Correct answer: Stylomastoid foramen- A. Occulomotor
- B. Trochlear
- C. Trigeminal
- D. Ophthalmic
Explanation: The superior oblique muscle depresses and abducts the eye, producing downward and lateral movement, and is supplied by the trochlear…
Correct answer: Trochlear- A. Occulomotor
- B. Trochlear
- C. Trigeminal
- D. Ophthalmic
Explanation: The lateral wall of the cavernous sinus contains cranial nerves III, IV, and the ophthalmic and maxillary divisions of V.
Correct answer: Trigeminal- A. Lateral rectus
- B. Superior oblique
- C. Superior rectus
- D. A & B
Explanation: The oculomotor nerve supplies superior, medial and inferior recti, inferior oblique and levator palpebrae.
Correct answer: A & B- A. Trochlear nerve
- B. Occulomotor
- C. Trigeminal nerve
- D. Superior oblique muscle
Explanation: Most levator palpebrae fibres are supplied by the oculomotor nerve, so its injury produces ptosis.
Correct answer: Occulomotor- A. Ptosis
- B. Miosis
- C. Outward eye deviation
- D. Diplopia
Explanation: Oculomotor palsy causes ptosis, diplopia and an abducted or outward-deviated eye because the intact lateral rectus and superior oblique…
Correct answer: Miosis- A. the muscles of mastication would be denervated
- B. the muscles of facial expression would be denervated
- C. taste from the right anterior two thirds of the tongue would not be affected
- D. sympathetic fibre to salivary gland would be interrupted
Explanation: The facial nerve supplies the muscles of facial expression, so a right facial-nerve lesion weakens those muscles on the right.
Correct answer: the muscles of facial expression would be denervated- A. Three pairs
- B. Four pairs
- C. Five pairs
- D. Two pairs
Explanation: The four paired parasympathetic ganglia of the head are ciliary, pterygopalatine, submandibular and otic.
Correct answer: Four pairs- A. Lingual artery
- B. Lingual nerve
- C. Inferior alveolar nerve
- D. Inferior alveolar artery
Explanation: The lingual nerve, inferior alveolar nerve and inferior alveolar vessels lie close enough to be endangered during mandibular third-molar…
Correct answer: Lingual artery- A. Facial nerve
- B. Oculomotor nerve
- C. Abducens
- D. Trochlear
Explanation: Oculomotor, trochlear and abducens nerves are classified as somatic efferent because they supply extraocular muscles.
Correct answer: Facial nerve- A. Glossopharyngeal
- B. Spinal accessory
- C. Vagus
- D. Hypoglossal
Explanation: The vagus nerve is the only cranial nerve in this list that extends beyond the head and neck to supply important structures in the thorax…
Correct answer: Vagus- A. Internal laryngeal nerve
- B. Recurrent laryngeal nerve
- C. Superior laryngeal nerve
- D. Internal and recurrent laryngeal nerve
Explanation: The recurrent laryngeal nerve supplies motor innervation to nearly all intrinsic laryngeal muscles, while the internal laryngeal nerve…
Correct answer: Internal and recurrent laryngeal nerve- A. Occulomotor nerve
- B. Abducens nerve
- C. Trochlear nerve
- D. Facial nerve
Explanation: The oculomotor nerve supplies levator palpebrae superioris, which elevates the upper eyelid, so its palsy produces ptosis.
Correct answer: Occulomotor nerve- A. Whole of face
- B. Only ipsilateral upper part of the face
- C. Only contra lateral lower part of the face
- D. Whole of lower face
Explanation: The upper facial muscles receive bilateral cortical input, whereas the lower facial muscles mainly receive input from the opposite…
Correct answer: Only contra lateral lower part of the face