Pituitary Gland Anatomy and Hormones Quiz

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Questions and Answers

Which pituitary gland is derived from a downgrowth of nervous tissue from the hypothalamus?

  • Posterior pituitary (correct)
  • Anterior pituitary
  • None of the above
  • Both anterior and posterior pituitary

Where is oxytocin synthesized in the body?

  • The posterior pituitary
  • The hypothalamopituitary tract
  • The paraventricular nucleus (correct)
  • The supraoptic nucleus

What percentage of the anterior pituitary do mammotrophs make up?

  • 50%
  • 30%
  • 20% (correct)
  • 10%

How do ADH and oxytocin travel to the posterior pituitary?

<p>Through the axons of the hypothalamopituitary tract (B)</p> Signup and view all the answers

Which pituitary gland arises as an epithelial upgrowth from Rathke's pouch?

<p>Anterior pituitary (C)</p> Signup and view all the answers

Which area of the gland do somatotrophs mainly predominate?

<p>Lateral lobes (A)</p> Signup and view all the answers

What is the specialized glandular epithelium that wraps around the anterior aspect of the posterior pituitary called?

<p>Adenohypophysis (D)</p> Signup and view all the answers

How is the release of posterior pituitary hormones controlled?

<p>By hormonal signals from the hypothalamus (A)</p> Signup and view all the answers

What is the function of prolactin?

<p>Regulates milk production during lactation (A)</p> Signup and view all the answers

Which pituitary gland secretes antidiuretic hormone (ADH) and oxytocin?

<p>Posterior pituitary (D)</p> Signup and view all the answers

Which hormone secretion is under the inhibitory control of dopamine?

<p>Prolactin (D)</p> Signup and view all the answers

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Study Notes

  • The anterior and posterior pituitary have different embryological origins.
  • The posterior pituitary is derived from a downgrowth of nervous tissue from the hypothalamus.
  • The anterior pituitary arises as an epithelial upgrowth from Rathke's pouch.
  • The adenohypophysis is the specialized glandular epithelium that wraps around the anterior aspect of the posterior pituitary.
  • The posterior pituitary secretes antidiuretic hormone (ADH) and oxytocin, while the anterior pituitary secretes various hormones controlled by releasing hormones.
  • ADH and oxytocin are synthesized in the hypothalamus and stored in the posterior pituitary.
  • Posterior pituitary hormone release is controlled directly by nervous impulses from the hypothalamus.
  • Anterior pituitary hormone release is controlled by specific hypothalamic releasing hormones.
  • Prolactin secretion is under the inhibitory control of dopamine, and growth hormone secretion is controlled by both releasing and inhibitory hormones.
  • The pars intermedia synthesizes and secretes melanocyte-stimulating hormone (MSH), but its physiological importance and control of secretion are poorly understood in humans.

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