All prostaglandins are derived from a 20-carbon precursor molecule called

Correct Answer: D

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

Correct Answer: A

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

Correct Answer: A

Rationale: Humoral mechanisms trigger hormone release via blood chemicals (e.g., high Ca²⁺ stimulates calcitonin) substance-driven. Neural uses nerve signals (e.g., epinephrine). Sensory isn't endocrine external stimuli perception. Hormonal involves hormone-hormone control (e.g., TSH). Humoral response to calcium distinguishes it, key to ion-based regulation, unlike neural, sensory, or hormonal triggers.

Correct Answer: A

Rationale: Alcohol suppresses ADH secretion, reducing kidney water reabsorption diuresis ensues, dehydrating. ADH increase would retain water, opposite effect. Aldosterone reabsorbs sodium, not directly water alcohol's ADH link is primary. ADH suppression with decreased reabsorption distinguishes it, key to alcohol's diuretic effect, unlike increased or aldosterone-based options.

Correct Answer: B

Rationale: Prolactin from anterior pituitary drives breast development and milk production lactogenic role. Oxytocin ejects milk, not produces. Estrogen aids breast growth but not milk synthesis. ADH manages water, unrelated. Prolactin's milk-producing action distinguishes it, critical for lactation, unlike ejection, growth, or water hormones.