Anatomy: Orbit Structures and Functions
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Questions and Answers

What is the main function of the lacrimal apparatus?

  • Supporting the eyeball in the orbit
  • Controlling eye movement
  • Regulating the size of the pupil
  • Producing tears to moisten and cleanse the eye (correct)

Where does the Inferior oblique muscle take its origin from?

  • Near the apex of the orbit
  • Floor anteromedially (correct)
  • Fixed to the roof anteromedially
  • Roof nearby

Which artery is responsible for supplying blood to the structures of the orbit?

  • Ophthalmic artery (correct)
  • External carotid artery
  • Facial artery
  • Internal jugular vein

What is the purpose of the orbital septum?

<p>Separating the bony orbit from the soft tissues around it (D)</p> Signup and view all the answers

Which structure is NOT considered part of the contents of the orbit?

<p>Trochlea (C)</p> Signup and view all the answers

What is the primary function of the nerves within the orbit?

<p>Supplying sensory and motor functions to various structures in and around the eye (C)</p> Signup and view all the answers

What muscle elevates the upper eyelid?

<p>Superior oblique (A)</p> Signup and view all the answers

Which nerve supplies the superior oblique muscle?

<p>Trochlear nerve (CN IV) (A)</p> Signup and view all the answers

Which muscle adducts the eye?

<p>Lateral rectus (D)</p> Signup and view all the answers

From which artery does the ophthalmic artery arise?

<p>Optic artery (B)</p> Signup and view all the answers

How do oculomotor, asociliary, and abducent nerves enter the orbit?

<p>Through SOF inside the ring (A)</p> Signup and view all the answers

What is the main function of the abducent nerve?

<p>Supplying the lateral rectus muscle (D)</p> Signup and view all the answers

Which nerve supplies the lacrimal gland?

<p>Lacrimal nerve (A)</p> Signup and view all the answers

What is the main function of the ciliary ganglion?

<p>Being parasympathetic (D)</p> Signup and view all the answers

Which structure forms the anterior boundary of the conjunctival sac?

<p>Orbital septum (A)</p> Signup and view all the answers

What is the function of the lacrimal puncta?

<p>To drain tears into the lacrimal canaliculi (B)</p> Signup and view all the answers

Which artery supplies blood to the upper eyelid?

<p>Supraorbital artery (D)</p> Signup and view all the answers

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