Milk ejection from the mammary glands is assisted by:

Correct Answer: C

Rationale: Oxytocin, from the posterior pituitary, triggers milk ejection by contracting myoepithelial cells in mammary glands during nursing. Prolactin, anterior pituitary, stimulates milk production, not ejection. Oxygen is a gas, not a hormone. 'Prostate hormone' (likely prostaglandin misnomer) is irrelevant prostate is male-specific. Oxytocin's contractile action distinguishes it, key for lactation, unlike production or non-hormonal factors.

Correct Answer: B

Rationale: Acromegaly, from adult GH hypersecretion, causes headaches (pituitary tumor pressure), visual issues (tumor on optic chiasm), enlarged features (ears, tongue), apathy, and glucose intolerance mimicking diabetes. Cushing's features fat redistribution and hypertension, not skeletal growth. Addison's shows fatigue and low glucose. 'Rhees's' is likely fictitious. Acromegaly's GH-driven signs distinguish it, key to its diagnosis, unlike adrenal or vague conditions.

Correct Answer: A

Rationale: Glucagon, from pancreatic alpha cells, raises blood glucose via glycogenolysis (breaking glycogen into glucose in the liver), gluconeogenesis (forming glucose from non-carbs), and liver glucose release countering insulin. Glucose transport into cells is insulin's role, not glucagon's it mobilizes, not stores. All three (glycogenolysis, gluconeogenesis, release) apply, but single-option format favors glycogenolysis as primary. Its glucose-mobilizing action distinguishes it, key to fasting glucose maintenance, unlike cellular uptake.

Correct Answer: C

Rationale: The anterior pituitary synthesizes thyroid-stimulating hormone (TSH) to regulate thyroid function. ADH and oxytocin are made in the hypothalamus, stored/released by the posterior pituitary, and cortisol is an adrenal hormone, not pituitary-derived. TSH's production site distinguishes it, crucial for thyroid hormone synthesis and metabolic control, contrasting with stored or peripheral hormones.

Correct Answer: C

Rationale: Adrenal glands sit atop the kidneys, one per side, producing hormones like cortisol and epinephrine. The thyroid is neck-based, liver below kidneys, and hypothalamus in the brain not adjacent. This renal positioning distinguishes adrenal anatomy, vital for stress and metabolic regulation, integrating with kidney function in endocrine control.