Thyroid Function and Circadian Rhythms Quiz

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Questions and Answers

Which of the following hormones is not considered as one of the anterior pituitary hormones?

  • Oxytocin (correct)
  • Follicle-Stimulating Hormone (FSH)
  • Growth Hormone (GH)
  • Thyroid-Stimulating Hormone (TSH)

What is a common cause of hypopituitarism related to pituitary and hypothalamic mass lesions?

  • Benign pituitary tumors (correct)
  • Pituitary surgery
  • Granulomatous diseases
  • Vascular injury

In which group is lymphocytic hypophysitis most commonly observed?

  • Adolescent boys
  • Elderly men
  • Pregnant women (correct)
  • Postmenopausal women

What is a potential cause of hypopituitarism related to trauma and vascular injury?

<p>Pituitary apoplexy (C)</p>
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Which gender generally experiences higher mortality in patients with hypopituitarism?

<p>Women (C)</p>
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Which of the following is NOT a congenital cause of hypopituitarism?

<p>Pituitary surgery/radiotherapy (B)</p>
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Which diet is high in phytochemicals, vitamins, nutrients, omega-3 fatty acids, and poly/monounsaturated fats?

<p>Mediterranean Diet (C)</p>
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What dietary intervention is recommended to reduce chronic stress-induced changes and inflammation caused by a Western diet?

<p>Prebiotics and Probiotics (A)</p>
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What can lead to depressive symptoms by causing disrupted oxidative phosphorylation and impairments in mitochondrial ATP generation?

<p>High-Fat Diets (C)</p>
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Which dietary consumption can lead to decreased bioavailability of serotonin and potentially worsen depressive symptoms?

<p>Low-Tryptophan Diet (D)</p>
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What dietary factor is known to preserve hippocampal function and increase levels of brain-derived neurotrophic factor (BDNF)?

<p>Mediterranean Diet (A)</p>
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What dietary intervention is recommended to reduce serum glucocorticoid levels in depressed patients?

<p>Mediterranean Diet (B)</p>
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How is chronic Growth Hormone Deficiency (GHD) in childhood diagnosed?

<p>Through chemical assessment of GH – IGF-1 axis and pituitary imaging (C)</p>
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What is the diagnostic method for GHD in adulthood?

<p>Using the insulin tolerance test (C)</p>
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What are the clinical manifestations of gonadotropin deficiency in men?

<p>Increased fat mass, reduced muscle mass, and low energy (B)</p>
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How is TSH deficiency diagnosed?

<p>By measuring serum TSH and free thyroxine concentrations (C)</p>
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What is the diagnostic method for ADH deficiency?

<p>Diagnosed through a water deprivation test to find hypernatremia and hypotonic polyuria (A)</p>
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What is the management approach for hypopituitarism related to prolactin deficiency in women?

<p>Estrogen replacement for women with gonadotropin deficiency (D)</p>
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What physiological responses are observed in police officers under high-stress conditions?

<p>Increased heart rate and decreased shooting skill (B)</p>
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How does stress impact memory formation and retrieval?

<p>Stress can both enhance and impair memory formation and retrieval (D)</p>
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What is the impact of repeated acute stress on glucocorticoid receptors (GR)?

<p>Downregulation of GR leading to prolonged exposure to glucocorticoids (B)</p>
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What approach can effectively reduce skill deficits in acute stress situations for police officers?

<p>Evidence-informed training, including virtual or scenario-based approaches (D)</p>
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What are the physiological responses elicited by stress?

<p>Physiological responses through the autonomic nervous system (ANS) and endocrine changes through the hypothalamus-pituitary-adrenal (HPA) axis (D)</p>
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How does stress alter memory processing?

<p>Stress alters memory processing from flexible cognitive to rigid habit-based systems (B)</p>
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What is the primary role of glucocorticoid receptors (GRs) and mineralocorticoid receptors (MRs) in the brain?

<p>Recognize glucocorticoids and lead to diverse effects and pathways (D)</p>
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What consequence can result from dysregulation of the hypothalamic-pituitary-adrenal (HPA) axis?

<p>Cushing's disease and Addison's disease (B)</p>
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What regulates the negative regulation of thyroid-stimulating hormone (TSH) and affects the seasonal reproduction signal?

<p>Melatonin receptor MT1 (A)</p>
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What controls the circadian rhythm and involves transcription and translation feedback loops of clock genes?

<p>Suprachiasmatic nucleus (SCN) (B)</p>
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What can affect the circadian clock and metabolic function, leading to alterations in gene expression in various tissues?

<p>Thyroid hormone deficiency and excess (C)</p>
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What is the primary role of the hypothalamic-pituitary-thyroid (HPT) axis?

<p>Involves the secretion of thyroid-releasing hormone (TRH) and stimulates the release of thyroid-stimulating hormone (TSH) (B)</p>
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Study Notes

Thyroid Function and Circadian Rhythms

  • Glucocorticoid receptors (GRs) and mineralocorticoid receptors (MRs) recognize glucocorticoids (GCs) in the hippocampus and other brain regions, leading to diverse effects and pathways.
  • Pulsatility of GCs is crucial for brain function and short-term stress mediation.
  • Dysregulation of the hypothalamic-pituitary-adrenal (HPA) axis can lead to health consequences such as Cushing's disease and Addison's disease.
  • The hypothalamic-pituitary-thyroid (HPT) axis involves the secretion of thyroid-releasing hormone (TRH) from neurons in the PVN of the hypothalamus, stimulating the release of thyroid-stimulating hormone (TSH) and subsequent production of thyroid hormones.
  • The circadian rhythm is controlled by the suprachiasmatic nucleus (SCN) and involves transcription and translation feedback loops of clock genes.
  • Evidence indicates that the circadian clock regulates the HPT axis and thyroid function, with human blood TSH levels exhibiting a clear daily rhythm.
  • Thyroid hormone deficiency and excess can affect the circadian clock and metabolic function, leading to alterations in gene expression in various tissues.
  • Thyroid nodules, both benign and malignant, exhibit alterations in the circadian clock machinery, potentially impacting thyroid function.
  • Seasonal rhythms and thyroid function are influenced by the hormone melatonin, which reflects night length and affects the regulation of thyroid-stimulating hormone (TSH).
  • Melatonin receptor MT1 regulates the negative regulation of TSH, affecting the seasonal reproduction signal and preventing Pars distalis-derived TSH overactivity.
  • Acute stress physiology can impact skilled motor performance, with the HPA axis playing a role in the physiological stress response.
  • Previous studies on police have focused on cognitive responses to high-stress environments, but the impact on muscular impairments is also significant.

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