ATI RN
Endocrine System Multiple Choice Questions Questions
Question 1 of 5
temperature regulation
Correct Answer: C
Rationale: Temperature regulation involves endogenous pyrogens (e.g., IL-1) from monocytes, macrophages, and Kupffer cells, raising hypothalamic setpoints in fever. It's hypothalamic, not cortical posterior hypothalamus heats, anterior cools (stimulation causes vasodilation, not hypothermia). Body temperature fluctuates daily, not constant. Pyrogens' mediation distinguishes fever's mechanism, key to immune-thermoregulatory link, unlike integration, regional, or stability claims.
Question 2 of 5
with respect to thirst, which is true
Correct Answer: D
Rationale: ACE inhibitors reduce angiotensin II, decreasing thirst in hypovolemia angiotensin II acts on subfornical organ, not just supraoptic nucleus (ADH site). Drinking and ADH differ thirst is behavioral, ADH hormonal. Dry membranes signal hypothalamus (e.g., via osmoreceptors), but angiotensin II's role is primary in volume loss. ACE inhibition distinguishes thirst modulation, key to RAAS-thirst link, unlike site, regulation, or membrane claims.
Question 3 of 5
Which does not utilize the same type of receptor in its mechanism of action
Correct Answer: A
Rationale: Insulin uses tyrosine kinase receptors (membrane-bound), driving glucose uptake via signaling cascades. Glucagon, PTH, and ACTH use G-protein-coupled receptors (GPCRs), activating cAMP similar mechanism. Insulin's distinct receptor type distinguishes it, key to its anabolic action, unlike cAMP-mediated hormones.
Question 4 of 5
Which of the following anterior pituitary hormones stimulates general body growth?
Correct Answer: A
Rationale: Growth hormone (GH) from the anterior pituitary promotes body growth by stimulating protein synthesis and cell division, unlike prolactin (milk production) or thyrotropin (thyroid stimulation). Though options are cut off, 'A' aligns with GH's role. This distinguishes GH's systemic anabolic effects, essential for development, contrasting with lactation or metabolic regulators.
Question 5 of 5
The amount of ADH that is secreted by the posterior pituitary glands varies with
Correct Answer: A
Rationale: Antidiuretic hormone (ADH) secretion from the posterior pituitary increases with high blood osmotic pressure, signaling dehydration, prompting water reabsorption in kidneys. Blood calcium, oxygen, or glucose levels don't directly regulate ADH calcium affects PTH, oxygen respiration, glucose insulin/glucagon. 'All choices' is incorrect as ADH's osmoregulatory role is specific. This distinguishes ADH's function in fluid homeostasis, critical for preventing dehydration, contrasting with unrelated metabolic or respiratory triggers.