Anatomy of the External Ear Quiz
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Questions and Answers

What is the blood supply for the external auricle (pinna)?

  • Facial artery
  • Superficial temporal and posterior auricular arteries (correct)
  • Maxillary artery
  • Superior thyroid artery

    • Which nerve provides sensory innervation to the external auricle (pinna)?

  • Glossopharyngeal nerve (CN 9)
  • Facial nerve (CN 7)
  • Vagus nerve (CN 10)
  • Great auricular nerve (C2-C3) and auriculotemporal nerve (CN 5) (correct)

    • What is the composition of the lateral 1/3 of the external auditory meatus?

  • Bony and lined by hair-lined skin with ceruminous glands
  • Cartilaginous and lined by hair-lined skin with ceruminous glands (correct)
  • Bony and lined by hairless skin with ceruminous glands
  • Cartilaginous and lined by hairless skin with ceruminous glands

    • What is the function of the pinna in the ear?

    <p>To funnel sound waves from the ambience into the canal</p> Signup and view all the answers

    What is the diameter of the tympanic membrane (eardrum)?

    <p>1 cm</p> Signup and view all the answers

    What is the composition of the margin of the tympanic membrane?

    <p>Fibrocartilaginous ring</p> Signup and view all the answers

    What is the floor of the middle ear lined by?

    <p>Mucous membrane</p> Signup and view all the answers

    What forms the lateral wall of the middle ear?

    <p>Membranous wall</p> Signup and view all the answers

    What constitutes the boundaries of the middle ear?

    <p>Tegmental wall, labyrinthine wall, jugular wall, mastoid wall</p> Signup and view all the answers

    Which part of the cranium forms a partition in the skull?

    <p>Dura mater</p> Signup and view all the answers

    What is the function of the falx cerebri?

    <p>Extend in the midline from crista galli to the internal occipital protuberance</p> Signup and view all the answers

    Which layer of the meninges forms delicate reticular fibers?

    <p>Arachnoid</p> Signup and view all the answers

    What is the shape of the diaphragma sellae?

    <p>Crescent-shaped</p> Signup and view all the answers

    Which part of the cranium separates the two cerebellar hemispheres?

    <p>Falx cerebelli</p> Signup and view all the answers

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