22 Questions
What is the approximate diameter of the pituitary gland?
1.3 cm
What bone supports the pituitary gland?
Sphenoid bone
What covers the pituitary gland?
Dura mater
What is the shape of the pituitary gland?
Rounded
What is the approximate size of the pituitary gland?
About 1.3 cm
What surrounds the pituitary gland?
The cerebral arterial circle
What is the function of the cerebral arterial circle?
To provide the pituitary gland with a rich blood supply
What is the pituitary gland rich in?
Blood vessels
What is the significance of the cerebral arterial circle surrounding the pituitary gland?
It provides the pituitary gland with a rich blood supply
What is characteristic of the pituitary gland?
It is highly vascular
What can be said about the adrenal glands?
They are highly vascular.
Who is the author of this medical concept?
Dr.Khalid Abdullah
How many lobes does the described structure have?
Two
What is the approximate length of each lobe?
5 cm
Where are the lobes positioned?
Laterally to the trachea
What connects the lobes anteriorly?
An isthmus
What is the function of the isthmus?
To connect the lobes
Which cells synthesize the two principal thyroid hormones?
Follicular cells
Which neurons innervate the thyroid?
Both postganglionic and preganglionic neurons
From which spinal cord segment do the preganglionic neurons originate?
Thoracic segment
Which ganglia give rise to the postganglionic neurons?
Cervical sympathetic ganglia
What is the function of the innervation of the thyroid?
The function is not specified in the content
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.
This quiz covers the anatomy and structure of the pituitary gland, including its size, shape, and location in the brain.
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