Hypothalamic Regulation of Hormonal Function Introduction

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Where do the sympathetic nerve fibers reach the anterior lobe of the pituitary from?

The petrosal nerves

The hypothalamus

The Rathke pouch

The capsule (correct)

What is the embryological origin of the posterior pituitary?

Hypothalamus

Rathke pouch

Supraoptic and paraventricular nuclei (correct)

Third ventricle

What forms a direct vascular link between the hypothalamus and the anterior pituitary?

Portal hypophysial vessels (correct)

Hypothalamohypophysial tract

Petrosal nerves

Sympathetic nerve fibers

What is the main function of the hypothalamus with respect to the limbic system?

Regulates emotional and instinctual behavior Signup and view all the answers

Which part of the pituitary gland arises embryologically from an evagination from the roof of the pharynx?

Anterior lobe Signup and view all the answers

What type of capillaries drain into the sinusoidal portal hypophysial vessels?

Fenestrated capillaries Signup and view all the answers

What is the primary plexus on the ventral surface of the hypothalamus formed by?

Arterial twigs from the carotid arteries and circle of Willis Signup and view all the answers

What stimulates thirst in response to decreased ECF volume?

Angiotensin II Signup and view all the answers

Which region is generally defined as the portion of the ventral hypothalamus from which the portal vessels arise?

Median eminence Signup and view all the answers

What factor contributes to an increase in liquid intake during eating (prandial drinking)?

Increase in plasma osmolality as food is absorbed Signup and view all the answers

How are the hormones of the posterior pituitary gland synthesized?

In the cell bodies of the magnocellular neurons and transported down the axons Signup and view all the answers

Where are vasopressin-secreting neurons found?

In the suprachiasmatic nuclei Signup and view all the answers

What is the function of V2 receptors?

Act through Gs to increase cyclic adenosine monophosphate levels Signup and view all the answers

Where are vasopressin and oxytocin also found, apart from the posterior pituitary gland?

Gonads and adrenal cortex Signup and view all the answers

What is the source of hormones that are typical neural hormones?

Secreted by nerve cells into the circulation Signup and view all the answers

Hypothalamic Regulation of Hormonal Function Introduction

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