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Anatomy of the Eye: Eyelids and Lacrimal Apparatus
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Anatomy of the Eye: Eyelids and Lacrimal Apparatus

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Questions and Answers

What is the primary location of the refractive power in the eye?

  • Lens itself
  • Posterior surface of the iris
  • Anterior surface of the cornea (correct)
  • Ciliary body
  • What is the function of the tear film in relation to the cornea?

  • To reduce the flow of aqueous humor
  • To regulate the pupil size
  • To maintain the normal environment for the corneal epithelial cells (correct)
  • To increase the refractive power of the cornea
  • What is the structure that connects the ciliary processes to the lens?

  • Suspensory ligaments (correct)
  • Meridianal fibers
  • Ciliary striae
  • Ciliary ring
  • What type of nerve fibers supply the ciliary muscle?

    <p>Parasympathetic fibers</p> Signup and view all the answers

    What is the effect of contraction of the ciliary muscle on the lens?

    <p>The lens becomes more convex</p> Signup and view all the answers

    What is the location of the ciliary body in relation to the iris?

    <p>Behind the peripheral margin of the iris</p> Signup and view all the answers

    What is the name of the small space that separates the medial angle of the eyelid from the eyeball?

    <p>Lacus lacrimalis</p> Signup and view all the answers

    What is the function of the punctum lacrimale?

    <p>To carry tears into the nose</p> Signup and view all the answers

    What is the name of the fibrous sheet that forms the framework of the eyelids?

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

    What is the name of the potential space that is formed by the reflection of the conjunctiva onto the anterior surface of the eyeball?

    <p>Conjunctival sac</p> Signup and view all the answers

    What is the name of the small, reddish yellow elevation located in the center of the lacus lacrimalis?

    <p>Caruncula lacrimalis</p> Signup and view all the answers

    What is the clinical importance of the subtarsal sulcus?

    <p>It traps small foreign particles</p> Signup and view all the answers

    What is the main function of the lens in the eye?

    <p>To contribute slightly to the magnifying power of the eye</p> Signup and view all the answers

    What is the purpose of the suspensory ligament in the eye?

    <p>To keep the elastic lens flattened for distant vision</p> Signup and view all the answers

    What happens to the shape of the lens when the ciliary muscle contracts?

    <p>It becomes more globular</p> Signup and view all the answers

    What is the function of the ciliary processes in the eye?

    <p>To encircle the lens and provide support</p> Signup and view all the answers

    What is the primary component of the lens?

    <p>Lens fibers</p> Signup and view all the answers

    What is the purpose of the cuboidal epithelium in the lens?

    <p>To form the lens fibers</p> Signup and view all the answers

    What is the narrowest part of the larynx in a male adult?

    <p>The glottis</p> Signup and view all the answers

    What is the function of the thyroepiglottic muscle?

    <p>Widening the laryngeal inlet</p> Signup and view all the answers

    What is the purpose of the mucous secretion produced by the saccule of the larynx?

    <p>To lubricate the vocal cords</p> Signup and view all the answers

    What is the region of the larynx situated between the vestibular folds and the vocal folds?

    <p>Middle region</p> Signup and view all the answers

    Which muscles move the larynx up and down during swallowing?

    <p>Extrinsic muscles</p> Signup and view all the answers

    What is the narrowest part of the larynx in children?

    <p>The lower part of the larynx within the cricoid cartilage</p> Signup and view all the answers

    Which pharyngeal pouch do the inferior parathyroid glands develop from?

    <p>Third pharyngeal pouch</p> Signup and view all the answers

    Where do the superior parathyroid glands finally come to rest?

    <p>On the posterior surface of the lateral lobe of the thyroid gland</p> Signup and view all the answers

    What is the arterial supply to the parathyroid glands?

    <p>Superior and inferior thyroid arteries</p> Signup and view all the answers

    What type of cells appear in the parathyroid glands in late childhood?

    <p>Acidophilic cells</p> Signup and view all the answers

    What is the venous drainage of the parathyroid glands?

    <p>Into the superior, middle, and inferior thyroid veins</p> Signup and view all the answers

    Where can the parathyroid glands sometimes be found?

    <p>Some distance caudal to the thyroid gland, in association with the inferior thyroid veins</p> Signup and view all the answers

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