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Functionally, the adenohypophysis of pituitary gland includes

 

Option: 1

Anterior lobe

 


Option: 2

Posterior lobe

 


Option: 3

Intermediate lobe

 


Option: 4

Both a and b

 


Answers (1)

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The Pituitary Gland and Its Anterior Lobe -

  • Pituitary gland develops from the ectoderm.
  • It is located just below the hypothalamus located in a bony cavity called Sella turcica of the sphenoid bone of the skull.
  • It is attached to the brain by a stalk called the infundibulum which is in continuation with the hypothalamus.
  • The pituitary gland is made up of two main lobes:
    • Larger anterior lobe or adenohypophysis or pars distalis
    • Smaller posterior lobe  or neurohypophysis or pars nervosa
  • There is a third lobe called the intermediate lobe or pars intermedia. It is a part of the adenohypophysis.
  • Hypothalamic hormones are secreted by neurons but enter the anterior pituitary through blood vessels.
  • Within the infundibulum is a bridge of capillaries that connects the hypothalamus to the anterior pituitary. 
  • This network, called the hypophyseal portal system, allows hypothalamic hormones to be transported to the anterior pituitary without first entering the systemic circulation.

 

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Functionally, the adenohypophysis of pituitary gland includes both anterior and posterior lobe. Hence, the correct option is d

Posted by

jitender.kumar

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