Hypothalamic Regulation of Hormonal Function Quiz

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Which type of feedback loop is more commonly seen in the endocrine system?

No feedback

Neutral feedback

Positive feedback

Negative feedback (correct)

What is the role of positive feedback in the endocrine system?

It enhances hormone release (correct)

It dampens hormonal action

It inhibits hormone release

It has no impact on hormone regulation

What does negative feedback entail in the context of the endocrine system?

Continued stimulation of hormonal action

Inhibition or dampening of hormone release (correct)

Enhancement of hormone release

No effect on hormone regulation

When is positive feedback typically observed in the endocrine system?

During parturition Signup and view all the answers

In a patient being assessed for hypothyroidism, what does normal TSH levels suggest?

A defect at the level of the anterior pituitary Signup and view all the answers

What is the role of feedback control loops in evaluating patients with suspected endocrine disorders?

To provide diagnostic insights Signup and view all the answers

What does an elevated TSH suggest?

Loss of ability of thyroid hormone to suppress TSH synthesis Signup and view all the answers

Which area of the brain is responsible for integrating autonomic mechanisms that regulate internal environment chemical constancy and temperature?

Hypothalamus Signup and view all the answers

What is the embryological origin of the posterior pituitary?

Evagination of the floor of the third ventricle Signup and view all the answers

Which nuclei in the hypothalamus give rise to axons that end in the posterior pituitary?

Supraoptic and paraventricular nuclei Signup and view all the answers

What type of connections exist between the hypothalamus and the anterior lobe of the pituitary gland?

Vascular connections Signup and view all the answers

What is the main function of the hypothalamus when it works with the limbic system?

Regulates emotional and instinctual behavior Signup and view all the answers

Which term is commonly used to refer to the chemical agents that control anterior pituitary secretion?

Hypophysiotropic hormones Signup and view all the answers

Which hormone is generally known as gonadotropin-releasing hormone (GnRH)?

Luteinizing hormone–releasing hormone (LHRH) Signup and view all the answers

What is the physiologic role of β-lipotropin (β-LPH) when secreted with ACTH?

Unknown Signup and view all the answers

What term is now generally used to refer to the growth hormone–inhibiting hormone (GIH)?

Somatostatin Signup and view all the answers

How are hypothalamic releasing and inhibiting hormones carried to the pituitary gland?

Carried in the portal hypophysial vessels Signup and view all the answers

Where are hypophysiotropic hormones at their highest concentration?

In portal hypophysial blood Signup and view all the answers