Pituitary Gland Structure
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Questions and Answers

What is the approximate diameter of the pituitary gland?

  • 1.3 cm (correct)
  • 0.5 mm
  • 5 cm
  • 2.5 cm
  • What bone supports the pituitary gland?

  • Frontal bone
  • Occipital bone
  • Sphenoid bone (correct)
  • Parietal bone
  • What covers the pituitary gland?

  • Arachnoid mater
  • Meninges
  • Pia mater
  • Dura mater (correct)
  • What is the shape of the pituitary gland?

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

    What is the approximate size of the pituitary gland?

    <p>About 1.3 cm</p> Signup and view all the answers

    What surrounds the pituitary gland?

    <p>The cerebral arterial circle</p> Signup and view all the answers

    What is the function of the cerebral arterial circle?

    <p>To provide the pituitary gland with a rich blood supply</p> Signup and view all the answers

    What is the pituitary gland rich in?

    <p>Blood vessels</p> Signup and view all the answers

    What is the significance of the cerebral arterial circle surrounding the pituitary gland?

    <p>It provides the pituitary gland with a rich blood supply</p> Signup and view all the answers

    What is characteristic of the pituitary gland?

    <p>It is highly vascular</p> Signup and view all the answers

    What can be said about the adrenal glands?

    <p>They are highly vascular.</p> Signup and view all the answers

    Who is the author of this medical concept?

    <p>Dr.Khalid Abdullah</p> Signup and view all the answers

    How many lobes does the described structure have?

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

    What is the approximate length of each lobe?

    <p>5 cm</p> Signup and view all the answers

    Where are the lobes positioned?

    <p>Laterally to the trachea</p> Signup and view all the answers

    What connects the lobes anteriorly?

    <p>An isthmus</p> Signup and view all the answers

    What is the function of the isthmus?

    <p>To connect the lobes</p> Signup and view all the answers

    Which cells synthesize the two principal thyroid hormones?

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

    Which neurons innervate the thyroid?

    <p>Both postganglionic and preganglionic neurons</p> Signup and view all the answers

    From which spinal cord segment do the preganglionic neurons originate?

    <p>Thoracic segment</p> Signup and view all the answers

    Which ganglia give rise to the postganglionic neurons?

    <p>Cervical sympathetic ganglia</p> Signup and view all the answers

    What is the function of the innervation of the thyroid?

    <p>The function is not specified in the content</p> Signup and view all the answers

    Study Notes

    Pituitary Gland

    • The pituitary gland is a rounded, pea-shaped gland, approximately 1.3 cm (0.5 in) in diameter.
    • It is covered by the dura mater and supported by the sella turcica of the sphenoid bone.
    • The gland is highly vascular and surrounded by the cerebral arterial circle, providing a rich blood supply.
    • The pituitary gland has two lobes, each about 5 cm long, positioned on either lateral side of the trachea and connected anteriorly by the isthmus.
    • The follicular cells of the pituitary gland synthesize the two principal thyroid hormones.

    Innervation of the Thyroid

    • The thyroid gland is innervated by postganglionic neurons from the superior and middle cervical sympathetic ganglia.
    • It is also innervated by preganglionic neurons from ganglia derived from the second through the seventh thoracic segment of the spinal cord.

    Adrenal Glands

    • The adrenal glands are highly vascular.

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    Description

    This quiz covers the anatomy and structure of the pituitary gland, including its size, shape, and location in the brain.

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