All of the following are secreted by the anterior pituitary except

Correct Answer: D

Rationale: Oxytocin, from hypothalamus, is stored/released by posterior pituitary, not anterior lactation/childbirth role. ACTH (adrenal), prolactin (lactation), and β-lipoprotein (lipid metabolism, though less common term) are anterior pituitary hormones. Oxytocin's posterior origin distinguishes it, key to pituitary division, unlike anterior tropic hormones.

Correct Answer: A

Rationale: Thyroid hormones (T3/T4) lower plasma cholesterol by enhancing LDL receptor clearance, not increase false claim. They boost Na/K ATPase (metabolism), β-receptors (catecholamine sensitivity), and calorigenesis (heat production). Cholesterol reduction distinguishes thyroid action, key to lipid metabolism, unlike metabolic, receptor, or heat truths.

Correct Answer: C

Rationale: Hormone secretion is typically triggered by nervous signals (e.g., hypothalamus to pituitary), blood chemistry (e.g., glucose for insulin), or other hormones not mechanical stretching, which suits exocrine glands (e.g., salivary). The cutoff omits options, but 'mechanical stretching' (C) is least endocrine-relevant per prior answer. This distinction underscores endocrine reliance on systemic cues, vital for coordinated responses, contrasting with mechanical triggers in other systems.

Correct Answer: A

Rationale: ADH secretion from the posterior pituitary adjusts to blood osmotic pressure high osmolarity (dehydration) increases ADH to retain water, not calcium, oxygen, or glucose directly. This osmoregulatory role distinguishes ADH, critical for fluid balance, contrasting with unrelated metabolic triggers.

Correct Answer: C

Rationale: Glucagon from pancreatic alpha cells raises blood glucose during hypoglycemia, unlike insulin (lowers), LH (reproduction), PTH (calcium), or calcitonin (calcium). This distinguishes glucagon's counterregulatory role, essential for fasting states, contrasting with unrelated functions.