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Ikut Turutan
Universiti
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ENDOCRINE SYSTEM (HARD)
hnisymimi
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# 1

pilihan

What happens to melatonin production if exposed to artificial blue light before sleep?

  • The pineal gland becomes inactive temporarily
  • Melatonin levels increase, improving sleep quality
  • Melatonin secretion decreases, leading to difficulty falling asleep
  • Melatonin secretion decreases, leading to difficulty falling asleep The hypothalamus overrides melatonin production

# 2

pilihan

How does melatonin regulate sleep through the hypothalamus?

  • It signals the suprachiasmatic nucleus to adjust sleep-wake cycles
  • It increases serotonin levels in the bloodstream
  • It prevents the release of cortisol
  • It stimulates the production of growth hormone

# 3

pilihan

A deficiency of ADH results in:

  • Diabetes mellitus
  • Addison’s disease
  • Diabetes insipidus
  • Cushing’s syndrome

# 4

pilihan

A patient presents with decreased levels of cortisol, T3/T4, and sex hormones, but normal levels of aldosterone. Which of the following is the most likely location of the dysfunction ?

  • Hypothalamus
  • Posterior pituitary
  • Anterior pituitary
  • Adrenal cortex (zona glomerulosa)

# 5

pilihan

Which of the following best explains why tumors of the parathyroid glands cause elevated calcium levels in the blood?

  • Increased activation of vitamin D by the kidneys
  • Stimulation of insulin release from the pancreas
  • Overproduction of PTH stimulates bone resorption and renal reabsorption
  • Suppression of calcitonin production by the thyroid gland

# 6

pilihan

Which one best describes Ectopic thymus ?

  • The bone marrow doesn’t produce enough red blood cells
  • Condition where thymus located somewhere than at the chest
  • Rare type of cancer that grows in cells of the thymus glands
  • Thymus gland sits close to the lung and blood vessels in the chest

# 7

pilihan

During the menstrual cycle, a surge in which hormone directly triggers ovulation?

  • Estrogen
  • Follicle-stimulating hormone (FSH)
  • Luteinizing hormone (LH)
  • Progesterone

# 8

pilihan

What is the role of inhibin secreted by the testes?

  • Stimulates testosterone release
  • Inhibits FSH production to regulate sperm production
  • Promotes muscle hypertrophy
  • Enhances LH activity

# 9

pilihan

Which layer of the adrenal cortex produces mineralocorticoids like aldosterone?

  • Zona Reticularis
  • Zona Fasciculata
  • Zona Glomerulosa
  • Zona Medullaris

# 10

pilihan

Which of the following is a developmental anomaly of the pancreas?

  • Addison’s disease
  • Adrenalectomy
  • Pancreatic divisum
  • Myxedema
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