ATI RN
Endocrine System MCQ Questions Questions
Question 1 of 5
Which is not a function of the hypothalamus?
Correct Answer: D
Rationale: The hypothalamus regulates heart rate (via autonomic nerves), temperature (thermoregulatory center), and water balance (ADH via posterior pituitary), but doesn't secrete FSH follicle-stimulating hormone comes from the anterior pituitary, stimulated by hypothalamic GnRH. Hypothalamus controls pituitary, not producing gonadotropins itself. FSH secretion's absence distinguishes it, highlighting hypothalamic oversight versus pituitary execution, critical for endocrine hierarchy.
Question 2 of 5
One of the two hormones made by the pituitary that help regulate reproductive cells is luteinizing hormone. The other hormone is
Correct Answer: B
Rationale: The pituitary's anterior lobe produces luteinizing hormone (LH) and follicle-stimulating hormone (FSH) to regulate gametogenesis FSH stimulates sperm/egg development, LH triggers sex hormone release. Androgens are gonadal, epinephrine/norepinephrine are adrenal not pituitary-made. FSH's paired role with LH distinguishes it, vital for reproduction, contrasting with stress hormones.
Question 3 of 5
Most of the endocrine system is regulated by:
Correct Answer: A
Rationale: Negative feedback, where hormone levels inhibit further release (e.g., T4 suppressing TSH), stabilizes the endocrine system. Positive feedback (e.g., oxytocin in labor) is rare, and complexes describe mechanisms, not regulation. Negative feedback's prevalence distinguishes endocrine control, critical for homeostasis, contrasting with amplifying loops.
Question 4 of 5
Which of the following has both endocrine and exocrine functions?
Correct Answer: D
Rationale: The pancreas has exocrine (digestive enzymes via ducts) and endocrine (insulin, glucagon into blood) roles. Anterior pituitary, thyroid, and adrenal medulla are solely endocrine. This dual function distinguishes the pancreas, vital for digestion and glucose control, contrasting with pure endocrine glands.
Question 5 of 5
Which gland secretes adrenaline?
Correct Answer: B
Rationale: Adrenaline (epinephrine) is secreted by the adrenal glands' medulla, atop the kidneys, triggering the fight-or-flight response by elevating heart rate and glucose availability. The thyroid produces thyroxine for metabolism, the pineal melatonin for sleep neither secrete adrenaline. 'More than one' is invalid as adrenaline is adrenal-specific. This gland's role in acute stress responses distinguishes it, key to survival mechanisms, contrasting with metabolic or circadian regulators.