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