Thyroid Hormones Biological Actions Quiz
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Questions and Answers

Which nerve increases the formation of thyroid hormones?

  • Vagus nerve
  • Adrenal nerve
  • Parasympathetic nerve
  • Sympathetic nerve (correct)

Which gland secretes aldosterone, the principal mineralocorticoid?

  • Thyroid gland
  • Pituitary gland
  • Pancreas
  • Adrenal gland (correct)

What is the main effect of glucocorticoids secreted by the adrenal gland?

  • Increase in blood glucose concentration (correct)
  • Inhibition of gluconeogenesis
  • Reduction of glycogen storage in liver cells
  • Decrease in blood glucose concentration

Which layer of the adrenal gland secretes glucocorticoids?

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

What effect does stimulation of gluconeogenesis by the liver cell have on glycogen storage?

<p>Marked increase in glycogen storage (A)</p> Signup and view all the answers

How do glucocorticoids affect the response of cells to insulin?

<p>Inhibit the response to insulin (D)</p> Signup and view all the answers

What is the primary function of thyroid hormones T3 and T4?

<p>Activate and initiate genetic transcription (B)</p> Signup and view all the answers

Which physiological level effect is seen with hyperthyroidism?

<p>Enhances catabolism of protein (C)</p> Signup and view all the answers

What is the consequence of hypothyroidism on protein metabolism?

<p>Promotes protein catabolism (C)</p> Signup and view all the answers

How do thyroid hormones affect carbohydrate metabolism?

<p>Promote glycogenolysis (C)</p> Signup and view all the answers

What is the calorigenic action of thyroid hormones on most tissues in the body?

<p>Promote heat production and increase BMR (A)</p> Signup and view all the answers

What is the effect of thyroid hormones on fat metabolism?

<p>Promote fat decomposition (B)</p> Signup and view all the answers

What is the role of TSH (thyroid-stimulating hormone) in the hypothalamic pituitary thyroid axis?

<p>Stimulate the thyroid gland to grow and increase the number of thyroid cells (B)</p> Signup and view all the answers

What effect does TRH (thyrotropin-releasing hormone) have on the anterior pituitary?

<p>Triggers the production and release of TSH (D)</p> Signup and view all the answers

What is the consequence of insufficient dietary iodide on thyroid hormone production?

<p>Elevated TSH secretion leading to abnormal growth of the thyroid (C)</p> Signup and view all the answers

How do large doses of iodide affect the thyroid gland's hormone synthesis?

<p>Inhibit hormone synthesis (C)</p> Signup and view all the answers

What is the role of inhibitory proteins in the anterior pituitary related to thyroid hormone regulation?

<p>Reduce TSH secretion (A)</p> Signup and view all the answers

How do cold temperatures and emotional reactions impact TRH secretion?

<p>Increase TRH secretion (B)</p> Signup and view all the answers

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