The primary source of heat in the body is:

Correct Answer: A

Rationale: produced as a byproduct of metabolic activities that generate energy for cellular functions, is correct as metabolism (e.g., in liver, muscles) generates heat via ATP production. No other choices are provided, but this aligns with physiology: cellular respiration converts nutrients into energy, releasing heat to maintain 98.6°F. Shivering or exercise boosts this, but basal metabolism is primary. The hypothalamus regulates this heat against losses (e.g., radiation). Unlike external sources, internal metabolic heat is constant, supporting homeostasis. Nursing recognizes this in fever (increased metabolism) or hypothermia (decreased). Thus, A is accurate, reflecting the bodys fundamental heat production mechanism.

Correct Answer: C

Rationale: Hyperthermia is an uncontrolled rise in body temperature when heat production exceeds dissipation , often from external factors or exertion, not set-point shifts. A downward set-point shift isn't hyperthermia. An upward shift defines fever, not hyperthermia. Reduced mechanisms may contribute but isn't the definition. Choice C is correct, distinguishing hyperthermia from fever per nursing pathophysiology, critical for appropriate interventions.

Correct Answer: B

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: C

Rationale: Normal body temperature ranges from 97°F to 99°F (36.1°C to 37.2°C) orally , adjusting slightly by route (e.g., rectal +1°F, axillary -1°F). 95°F to 98°F includes hypothermia. 98°F to 105°F spans fever. 95°F to 100°F is too broad. Choice C is correct, reflecting standard ranges in nursing texts (e.g., Potter & Perry), critical for identifying normothermia versus deviations like fever or hypothermia.

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.