Excretion

• Homeorhetic Nutrient Partitioning Hormones: Growth Hormone (GH / Somatotropin) and Prolactin (PRL) are the primary homeorhetic hormones orchestrating nutrient partitioning.
• Lactation Coordination: During early lactation and rapid skeletal growth, GH and PRL coordinate metabolism to prioritize the partitioning of circulating glucose, amino acids, and fatty acids toward the mammary gland or lean muscle mass at the expense of adipose tissue deposition.

Correct option: (1) GHIPRL

• Inaccurate Hormone-Metabolic Pairing:
• Free Fatty Acid Mobilization : Dehydroepiandrosterone is INCORRECTLY paired [Option 2]. Free fatty acid mobilization (adipose lipolysis) is stimulated by catecholamines (epinephrine), glucagon, growth hormone, and cortisol; DHEA is an adrenal steroid precursor for androgens/estrogens with negligible lipolytic activity.
• Correct Pairings: Cortisol stimulates gluconeogenesis; Epinephrine stimulates muscle glycogenolysis; Aldosterone stimulates renal kaliuresis (potassium excretion).

Correct option: (2) Free fatty acid mobilization : dehydroepiandrosterone

• Hypothalamic Thermoregulatory Set-Point: Factors that directly alter the hypothalamic set-point temperature include Fever (pyrogens), Hibernation, and Circadian rhythms (sleep/pain).
• Feeding Effect: Feeding produces postprandial diet-induced thermogenesis (heat increment of feeding) through digestive and metabolic work, but does NOT alter the central hypothalamic thermostat set-point [Option 4].

Correct option: (4) Feeding